transformfeedback.c revision 38b118d49ddbc8bd5d96cc0d23d681887fca045e
1de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/* 2de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Mesa 3-D graphics library 3de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 4de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Copyright (C) 2010 VMware, Inc. All Rights Reserved. 5de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 6de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Permission is hereby granted, free of charge, to any person obtaining a 7de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * copy of this software and associated documentation files (the "Software"), 8de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * to deal in the Software without restriction, including without limitation 9de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * and/or sell copies of the Software, and to permit persons to whom the 11de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Software is furnished to do so, subject to the following conditions: 12de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 13de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * The above copyright notice and this permission notice shall be included 14de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * in all copies or substantial portions of the Software. 15de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 16de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 20de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 22de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 23de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 24de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 25de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/* 26de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Vertex transform feedback support. 27de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 28de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Authors: 29de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Brian Paul 30de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 31de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 32de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 33de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul#include "buffers.h" 34de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul#include "bufferobj.h" 35de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul#include "context.h" 36fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul#include "hash.h" 37db61b9ce39bccc43140357652ceb78baaf2aea44Vinson Lee#include "mfeatures.h" 380117da40cd7edd3d165bb28569c289b37eca12b9Vinson Lee#include "mtypes.h" 39de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul#include "transformfeedback.h" 40a37b2219d6e3f299379c6434d65f300660d12c3eBrian Paul#include "shaderapi.h" 41a37b2219d6e3f299379c6434d65f300660d12c3eBrian Paul#include "shaderobj.h" 42b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu#include "main/dispatch.h" 43de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 44ec2b92f98c2e7f161521b447cc1d9a36bce3707cBrian Paul#include "program/prog_parameter.h" 45de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 46de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 47b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu#if FEATURE_EXT_transform_feedback 48b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu 49b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu 50de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 51fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Do reference counting of transform feedback buffers. 52fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 53fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 54fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulreference_transform_feedback_object(struct gl_transform_feedback_object **ptr, 55fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 56fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 57fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (*ptr == obj) 58fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 59fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 60fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (*ptr) { 61fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* Unreference the old object */ 62fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *oldObj = *ptr; 63fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 64fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ASSERT(oldObj->RefCount > 0); 65fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul oldObj->RefCount--; 66fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 67fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (oldObj->RefCount == 0) { 68fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 69fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (ctx) 70fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.DeleteTransformFeedback(ctx, oldObj); 71fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 72fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 73fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul *ptr = NULL; 74fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 75fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ASSERT(!*ptr); 76fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 77fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj) { 78fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* reference new object */ 79fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->RefCount == 0) { 80fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_problem(NULL, "referencing deleted transform feedback object"); 81fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul *ptr = NULL; 82fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 83fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul else { 84fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->RefCount++; 85fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul *ptr = obj; 86fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 87fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 88fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 89fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 90fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 91fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 92de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Check if the given primitive mode (as in glBegin(mode)) is compatible 93de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * with the current transform feedback mode (if it's enabled). 94de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * This is to be called from glBegin(), glDrawArrays(), glDrawElements(), etc. 95de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * 96de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * \return GL_TRUE if the mode is OK, GL_FALSE otherwise. 97de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 98de8530e1546733bf21b2e0518d6c5bda560770b9Brian PaulGLboolean 99f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_validate_primitive_mode(struct gl_context *ctx, GLenum mode) 100de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 101fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (ctx->TransformFeedback.CurrentObject->Active) { 102de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul switch (mode) { 103de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_POINTS: 104de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return ctx->TransformFeedback.Mode == GL_POINTS; 105de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_LINES: 106de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_LINE_STRIP: 107de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_LINE_LOOP: 108de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return ctx->TransformFeedback.Mode == GL_LINES; 109de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul default: 110de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return ctx->TransformFeedback.Mode == GL_TRIANGLES; 111de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 112de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 113de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return GL_TRUE; 114de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 115de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 116de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 117de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 118de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Check that all the buffer objects currently bound for transform 119de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * feedback actually exist. Raise a GL_INVALID_OPERATION error if 120de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * any buffers are missing. 121de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * \return GL_TRUE for success, GL_FALSE if error 122de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 123de8530e1546733bf21b2e0518d6c5bda560770b9Brian PaulGLboolean 124f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_validate_transform_feedback_buffers(struct gl_context *ctx) 125de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 126fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* XXX to do */ 127de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return GL_TRUE; 128de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 129de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 130de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 131de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 132de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 133de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Per-context init for transform feedback. 134de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 135de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid 136f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_init_transform_feedback(struct gl_context *ctx) 137de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 13832a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu /* core mesa expects this, even a dummy one, to be available */ 13932a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ASSERT(ctx->Driver.NewTransformFeedback); 140fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 141fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.DefaultObject = 142fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.NewTransformFeedback(ctx, 0); 143fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 144fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->TransformFeedback.DefaultObject->RefCount == 1); 145fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 146fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul reference_transform_feedback_object(&ctx->TransformFeedback.CurrentObject, 147fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.DefaultObject); 148fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 149fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->TransformFeedback.DefaultObject->RefCount == 2); 150fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 151fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.Objects = _mesa_NewHashTable(); 152fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 153de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_reference_buffer_object(ctx, 154de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul &ctx->TransformFeedback.CurrentBuffer, 155de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul ctx->Shared->NullBufferObj); 156de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 157de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 158de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 159fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 160fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 161fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Callback for _mesa_HashDeleteAll(). 162fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 163fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 164fef6e36e0736a68e24d7844bae65a01de8359214Brian Pauldelete_cb(GLuint key, void *data, void *userData) 165fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 166f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg struct gl_context *ctx = (struct gl_context *) userData; 167fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj = 168fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul (struct gl_transform_feedback_object *) data; 169fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 170fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.DeleteTransformFeedback(ctx, obj); 171fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 172fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 173fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 174de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 175de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Per-context free/clean-up for transform feedback. 176de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 177de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid 178f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_free_transform_feedback(struct gl_context *ctx) 179de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 18032a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu /* core mesa expects this, even a dummy one, to be available */ 18132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ASSERT(ctx->Driver.NewTransformFeedback); 182fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 183de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_reference_buffer_object(ctx, 184de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul &ctx->TransformFeedback.CurrentBuffer, 185de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul NULL); 186fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 187fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* Delete all feedback objects */ 188fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_HashDeleteAll(ctx->TransformFeedback.Objects, delete_cb, ctx); 1895b90f83aee89d051983485cdec5b5db2f3659256Brian Paul _mesa_DeleteHashTable(ctx->TransformFeedback.Objects); 190fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 191fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* Delete the default feedback object */ 192fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->Driver.DeleteTransformFeedback); 19339c13a115eb45fb6c711cd86cda3a0c178975b52Brian Paul ctx->Driver.DeleteTransformFeedback(ctx, 19439c13a115eb45fb6c711cd86cda3a0c178975b52Brian Paul ctx->TransformFeedback.DefaultObject); 195fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 196fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.CurrentObject = NULL; 197de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 198de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 199de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 20032a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu#else /* FEATURE_EXT_transform_feedback */ 20132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 20232a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu/* forward declarations */ 20332a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wustatic struct gl_transform_feedback_object * 204f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergnew_transform_feedback(struct gl_context *ctx, GLuint name); 20532a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 20632a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wustatic void 207f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergdelete_transform_feedback(struct gl_context *ctx, 20832a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu struct gl_transform_feedback_object *obj); 20932a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 21032a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu/* dummy per-context init/clean-up for transform feedback */ 21132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wuvoid 212f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_init_transform_feedback(struct gl_context *ctx) 21332a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu{ 21432a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ctx->TransformFeedback.DefaultObject = new_transform_feedback(ctx, 0); 21532a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ctx->TransformFeedback.CurrentObject = ctx->TransformFeedback.DefaultObject; 21632a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu _mesa_reference_buffer_object(ctx, 21732a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu &ctx->TransformFeedback.CurrentBuffer, 21832a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ctx->Shared->NullBufferObj); 21932a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu} 22032a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 22132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wuvoid 222f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg_mesa_free_transform_feedback(struct gl_context *ctx) 22332a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu{ 22432a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu _mesa_reference_buffer_object(ctx, 22532a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu &ctx->TransformFeedback.CurrentBuffer, 22632a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu NULL); 22732a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu ctx->TransformFeedback.CurrentObject = NULL; 22832a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu delete_transform_feedback(ctx, ctx->TransformFeedback.DefaultObject); 22932a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu} 23032a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 23132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu#endif /* FEATURE_EXT_transform_feedback */ 23232a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 23332a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 234fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.NewTransformFeedback() */ 235fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic struct gl_transform_feedback_object * 236f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergnew_transform_feedback(struct gl_context *ctx, GLuint name) 237fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 238fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 239fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = CALLOC_STRUCT(gl_transform_feedback_object); 240fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj) { 241fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Name = name; 242fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->RefCount = 1; 243fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 244fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return obj; 245fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 246fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 247fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.DeleteTransformFeedback() */ 248fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 249f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergdelete_transform_feedback(struct gl_context *ctx, 250fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 251fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 252fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GLuint i; 253fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 254fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul for (i = 0; i < Elements(obj->Buffers); i++) { 255fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_reference_buffer_object(ctx, &obj->Buffers[i], NULL); 256fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 257fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 258fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul free(obj); 259fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 260fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 26132a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 26232a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu#if FEATURE_EXT_transform_feedback 26332a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 26432a9b2799e5e1254fdf84af8248ea86e234d6dd4Chia-I Wu 265fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.BeginTransformFeedback() */ 266fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 267f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergbegin_transform_feedback(struct gl_context *ctx, GLenum mode, 268fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 269fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 270fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* nop */ 271fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 272fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 273fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.EndTransformFeedback() */ 274fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 275f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergend_transform_feedback(struct gl_context *ctx, 276fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 277fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 278fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* nop */ 279fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 280fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 281fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.PauseTransformFeedback() */ 282fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 283f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergpause_transform_feedback(struct gl_context *ctx, 284fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 285fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 286fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* nop */ 287fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 288fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 289fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** Default fallback for ctx->Driver.ResumeTransformFeedback() */ 290fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulstatic void 291f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergresume_transform_feedback(struct gl_context *ctx, 292fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj) 293fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 294fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* nop */ 295fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 296fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 297fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 298fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 299fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Plug in default device driver functions for transform feedback. 300fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Most drivers will override some/all of these. 301fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 302fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid 303fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_init_transform_feedback_functions(struct dd_function_table *driver) 304fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 305fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->NewTransformFeedback = new_transform_feedback; 306fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->DeleteTransformFeedback = delete_transform_feedback; 307fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->BeginTransformFeedback = begin_transform_feedback; 308fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->EndTransformFeedback = end_transform_feedback; 309fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->PauseTransformFeedback = pause_transform_feedback; 310fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul driver->ResumeTransformFeedback = resume_transform_feedback; 311fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 312fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 313fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 314b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wuvoid 315b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu_mesa_init_transform_feedback_dispatch(struct _glapi_table *disp) 316b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu{ 31748dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák /* EXT_transform_feedback */ 318b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_BeginTransformFeedbackEXT(disp, _mesa_BeginTransformFeedback); 319b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_EndTransformFeedbackEXT(disp, _mesa_EndTransformFeedback); 320b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_BindBufferRangeEXT(disp, _mesa_BindBufferRange); 321b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_BindBufferBaseEXT(disp, _mesa_BindBufferBase); 322b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_BindBufferOffsetEXT(disp, _mesa_BindBufferOffsetEXT); 323b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_TransformFeedbackVaryingsEXT(disp, _mesa_TransformFeedbackVaryings); 324b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu SET_GetTransformFeedbackVaryingEXT(disp, _mesa_GetTransformFeedbackVarying); 32548dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák /* ARB_transform_feedback2 */ 32648dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_BindTransformFeedback(disp, _mesa_BindTransformFeedback); 32748dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_DeleteTransformFeedbacks(disp, _mesa_DeleteTransformFeedbacks); 32848dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_GenTransformFeedbacks(disp, _mesa_GenTransformFeedbacks); 32948dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_IsTransformFeedback(disp, _mesa_IsTransformFeedback); 33048dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_PauseTransformFeedback(disp, _mesa_PauseTransformFeedback); 33148dcdcffd61c6c3755d818493bc3b7bdc1260ea5Marek Olšák SET_ResumeTransformFeedback(disp, _mesa_ResumeTransformFeedback); 332b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu} 333b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu 334fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 335fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 336fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ** Begin API functions 337fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul **/ 338fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 339fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 340de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 341de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_BeginTransformFeedback(GLenum mode) 342de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 343fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 344de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 345de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 346fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 347fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 348de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul switch (mode) { 349de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_POINTS: 350de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_LINES: 351de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_TRIANGLES: 352de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* legal */ 353de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul break; 354de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul default: 355de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, "glBeginTransformFeedback(mode)"); 356de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 357de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 358de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 359fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->Active) { 360de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 361de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBeginTransformFeedback(already active)"); 362de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 363de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 364de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 365a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); 366fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Active = GL_TRUE; 367de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul ctx->TransformFeedback.Mode = mode; 368fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 369fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->Driver.BeginTransformFeedback); 370fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.BeginTransformFeedback(ctx, mode, obj); 371de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 372de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 373de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 374de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 375de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_EndTransformFeedback(void) 376de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 377fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 378de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 379de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 380fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 381fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 382fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!obj->Active) { 383de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 384de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glEndTransformFeedback(not active)"); 385de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 386de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 387de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 388a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); 389fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.CurrentObject->Active = GL_FALSE; 39014bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšák ctx->TransformFeedback.CurrentObject->EndedAnytime = GL_TRUE; 391fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 392fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->Driver.EndTransformFeedback); 393fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.EndTransformFeedback(ctx, obj); 394de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 395de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 396de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 397de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 398de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Helper used by BindBufferRange() and BindBufferBase(). 399de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 400de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulstatic void 401f9995b30756140724f41daf963fa06167912be7fKristian Høgsbergbind_buffer_range(struct gl_context *ctx, GLuint index, 402de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_buffer_object *bufObj, 403de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLintptr offset, GLsizeiptr size) 404de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 405fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj = 406fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->TransformFeedback.CurrentObject; 407a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); 408fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 409de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* The general binding point */ 410de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_reference_buffer_object(ctx, 411de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul &ctx->TransformFeedback.CurrentBuffer, 412de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bufObj); 413de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 414de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* The per-attribute binding point */ 415de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_reference_buffer_object(ctx, 416fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul &obj->Buffers[index], 417de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bufObj); 418de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 419fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->BufferNames[index] = bufObj->Name; 420de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 421fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Offset[index] = offset; 422fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Size[index] = size; 423de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 424de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 425de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 426de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 427de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Specify a buffer object to receive vertex shader results. Plus, 428de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * specify the starting offset to place the results, and max size. 429de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 430de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 431de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_BindBufferRange(GLenum target, GLuint index, 432de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLuint buffer, GLintptr offset, GLsizeiptr size) 433de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 434fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 435de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_buffer_object *bufObj; 436de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 437de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 438de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { 439de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)"); 440de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 441de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 442de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 443fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 444fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 445fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->Active) { 446de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 447de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBindBufferRange(transform feedback active)"); 448de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 449de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 450de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 451de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { 452de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index); 453de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 454de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 455de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 456de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if ((size <= 0) || (size & 0x3)) { 457de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* must be positive and multiple of four */ 4589eca0e2c3e9409b5da49d9a5052d3665e7d45bb1Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size%d)", (int) size); 459de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 460de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 461de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 462de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (offset & 0x3) { 463de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* must be multiple of four */ 464de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 4659eca0e2c3e9409b5da49d9a5052d3665e7d45bb1Brian Paul "glBindBufferRange(offset=%d)", (int) offset); 466de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 467de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 468de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 469de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bufObj = _mesa_lookup_bufferobj(ctx, buffer); 470de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!bufObj) { 471de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 472de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBindBufferRange(invalid buffer=%u)", buffer); 473de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 474de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 475de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 47638b118d49ddbc8bd5d96cc0d23d681887fca045ePaul Berry if (offset + size > bufObj->Size) { 477de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 47886af037e6a1643284f87c5e01c3fcb09dd07bf35Eric Anholt "glBindBufferRange(offset + size %d > buffer size %d)", 4799eca0e2c3e9409b5da49d9a5052d3665e7d45bb1Brian Paul (int) (offset + size), (int) (bufObj->Size)); 480de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 481de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 482de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 483de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bind_buffer_range(ctx, index, bufObj, offset, size); 484de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 485de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 486de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 487de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 488de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Specify a buffer object to receive vertex shader results. 489de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * As above, but start at offset = 0. 490de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 491de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 492de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer) 493de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 494fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 495de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_buffer_object *bufObj; 496de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLsizeiptr size; 497fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 498de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 499de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { 500de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)"); 501de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 502de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 503de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 504fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 505fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 506fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->Active) { 507de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 5082be2e1d3ada2d9cb5c1c42e955629d8fbbafcd0bBrian Paul "glBindBufferBase(transform feedback active)"); 509de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 510de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 511de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 512de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { 513de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index); 514de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 515de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 516de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 517de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bufObj = _mesa_lookup_bufferobj(ctx, buffer); 518de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!bufObj) { 519de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 520de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBindBufferBase(invalid buffer=%u)", buffer); 521de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 522de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 523de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 524de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* default size is the buffer size rounded down to nearest 525de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * multiple of four. 526de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 527de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul size = bufObj->Size & ~0x3; 528de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 529de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bind_buffer_range(ctx, index, bufObj, 0, size); 530de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 531de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 532de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 533de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 534de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Specify a buffer object to receive vertex shader results, plus the 535de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * offset in the buffer to start placing results. 536de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * This function is part of GL_EXT_transform_feedback, but not GL3. 537de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 538de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 539de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer, 540de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLintptr offset) 541de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 542fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 543de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_buffer_object *bufObj; 544de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 545de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLsizeiptr size; 546de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 547de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { 548de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferOffsetEXT(target)"); 549de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 550de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 551de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 552fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 553fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 554fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->Active) { 555de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 5562be2e1d3ada2d9cb5c1c42e955629d8fbbafcd0bBrian Paul "glBindBufferOffsetEXT(transform feedback active)"); 557de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 558de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 559de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 560de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { 561de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 562de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBindBufferOffsetEXT(index=%d)", index); 563de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 564de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 565de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 566de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bufObj = _mesa_lookup_bufferobj(ctx, buffer); 567de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!bufObj) { 568de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 569de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glBindBufferOffsetEXT(invalid buffer=%u)", buffer); 570de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 571de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 572de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 573de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* default size is the buffer size rounded down to nearest 574de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * multiple of four. 575de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 576de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul size = (bufObj->Size - offset) & ~0x3; 577de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 578de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul bind_buffer_range(ctx, index, bufObj, offset, size); 579de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 580de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 581de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 582de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 583de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * This function specifies the vertex shader outputs to be written 584de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * to the feedback buffer(s), and in what order. 585de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 586de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 587de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_TransformFeedbackVaryings(GLuint program, GLsizei count, 588de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul const GLchar **varyings, GLenum bufferMode) 589de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 590de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_shader_program *shProg; 591de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLuint i; 592de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 593de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 594de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul switch (bufferMode) { 595de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_INTERLEAVED_ATTRIBS: 596de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul break; 597de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul case GL_SEPARATE_ATTRIBS: 598de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul break; 599de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul default: 600de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, 601de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glTransformFeedbackVaryings(bufferMode)"); 602de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 603de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 604de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 605f77aa278d354bebdbda940b31c9cccf12a5d146fMarek Olšák if (count < 0 || 606f77aa278d354bebdbda940b31c9cccf12a5d146fMarek Olšák (bufferMode == GL_SEPARATE_ATTRIBS && 607c67d9cfd9d5d04b5b32170616f75b34e0192304bBrian Paul (GLuint) count > ctx->Const.MaxTransformFeedbackSeparateAttribs)) { 608de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 609de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glTransformFeedbackVaryings(count=%d)", count); 610de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 611de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 612de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 613de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg = _mesa_lookup_shader_program(ctx, program); 614de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!shProg) { 615de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 616de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glTransformFeedbackVaryings(program=%u)", program); 617de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 618de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 619de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 620de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* free existing varyings, if any */ 621de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) { 622de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul free(shProg->TransformFeedback.VaryingNames[i]); 623de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 624de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul free(shProg->TransformFeedback.VaryingNames); 625de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 626de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* allocate new memory for varying names */ 627de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg->TransformFeedback.VaryingNames = 628de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul (GLchar **) malloc(count * sizeof(GLchar *)); 629de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 630de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!shProg->TransformFeedback.VaryingNames) { 631de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTransformFeedbackVaryings()"); 632de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 633de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 634de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 635de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* Save the new names and the count */ 636de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul for (i = 0; i < (GLuint) count; i++) { 637de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg->TransformFeedback.VaryingNames[i] = _mesa_strdup(varyings[i]); 638de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 639de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg->TransformFeedback.NumVarying = count; 640de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 641de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg->TransformFeedback.BufferMode = bufferMode; 642de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 643a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry /* No need to set _NEW_TRANSFORM_FEEDBACK (or invoke FLUSH_VERTICES) since 644a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry * the varyings won't be used until shader link time. 645a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry */ 646de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 647de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 648de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 649de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul/** 650de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * Get info about the vertex shader's outputs which are to be written 651de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul * to the feedback buffer(s). 652de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul */ 653de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paulvoid GLAPIENTRY 654de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul_mesa_GetTransformFeedbackVarying(GLuint program, GLuint index, 655de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLsizei bufSize, GLsizei *length, 656de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLsizei *size, GLenum *type, GLchar *name) 657de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul{ 658de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul const struct gl_shader_program *shProg; 659de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul const GLchar *varyingName; 660de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GLint v; 661de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul GET_CURRENT_CONTEXT(ctx); 662de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 663de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul shProg = _mesa_lookup_shader_program(ctx, program); 664de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (!shProg) { 665de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 666de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glGetTransformFeedbackVaryings(program=%u)", program); 667de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 668de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 669de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 670de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (index >= shProg->TransformFeedback.NumVarying) { 671de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, 672de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul "glGetTransformFeedbackVaryings(index=%u)", index); 673de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul return; 674de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 675de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 676de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul varyingName = shProg->TransformFeedback.VaryingNames[index]; 677de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 678de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul v = _mesa_lookup_parameter_index(shProg->Varying, -1, varyingName); 679de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (v >= 0) { 680de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul struct gl_program_parameter *param = &shProg->Varying->Parameters[v]; 681de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 682de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* return the varying's name and length */ 683de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul _mesa_copy_string(name, bufSize, length, varyingName); 684de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 685de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul /* return the datatype and value's size (in datatype units) */ 686de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (type) 6873100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul *type = param->DataType; 688de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul if (size) 689de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul *size = param->Size; 690de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul } 6913100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul else { 6923100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul name[0] = 0; 6933100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul if (length) 6943100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul *length = 0; 6953100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul if (type) 6963100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul *type = 0; 6973100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul if (size) 6983100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul *size = 0; 6993100f31b747a3294e1e7043ed9a61d8b90bf423aBrian Paul } 700de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul} 701de8530e1546733bf21b2e0518d6c5bda560770b9Brian Paul 702fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 703fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 70414bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšákstruct gl_transform_feedback_object * 70514bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšák_mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name) 706fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 707fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (name == 0) { 708fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return ctx->TransformFeedback.DefaultObject; 709fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 710fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul else 711fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return (struct gl_transform_feedback_object *) 712fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_HashLookup(ctx->TransformFeedback.Objects, name); 713fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 714fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 715fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 716fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 717fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Create new transform feedback objects. Transform feedback objects 718fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * encapsulate the state related to transform feedback to allow quickly 719fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * switching state (and drawing the results, below). 720fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 721fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 722fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid GLAPIENTRY 723fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_GenTransformFeedbacks(GLsizei n, GLuint *names) 724fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 725fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GLuint first; 726fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 727fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 728fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ASSERT_OUTSIDE_BEGIN_END(ctx); 729fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 730fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (n < 0) { 731fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, "glGenTransformFeedbacks(n < 0)"); 732fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 733fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 734fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 735fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!names) 736fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 737fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 738fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* we don't need contiguous IDs, but this might be faster */ 739fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul first = _mesa_HashFindFreeKeyBlock(ctx->TransformFeedback.Objects, n); 740fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (first) { 741fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GLsizei i; 742fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul for (i = 0; i < n; i++) { 743fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj 744fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul = ctx->Driver.NewTransformFeedback(ctx, first + i); 745fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!obj) { 746fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTransformFeedbacks"); 747fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 748fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 749fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul names[i] = first + i; 750fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_HashInsert(ctx->TransformFeedback.Objects, first + i, obj); 751fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 752fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 753fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul else { 754fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTransformFeedbacks"); 755fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 756fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 757fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 758fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 759fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 760fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Is the given ID a transform feedback object? 761fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 762fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 763fef6e36e0736a68e24d7844bae65a01de8359214Brian PaulGLboolean GLAPIENTRY 764fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_IsTransformFeedback(GLuint name) 765fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 766fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 767fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 768fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); 769fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 77014bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšák if (name && _mesa_lookup_transform_feedback_object(ctx, name)) 771fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return GL_TRUE; 772fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul else 773fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return GL_FALSE; 774fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 775fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 776fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 777fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 778fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Bind the given transform feedback object. 779fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 780fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 781fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid GLAPIENTRY 782d74f525060f779cfe449c20853b11ba2bbcdea6dVinson Lee_mesa_BindTransformFeedback(GLenum target, GLuint name) 783fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 784fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 785fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 786fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 787fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (target != GL_TRANSFORM_FEEDBACK) { 788fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_ENUM, "glBindTransformFeedback(target)"); 789fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 790fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 791fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 792fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (ctx->TransformFeedback.CurrentObject->Active && 793fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul !ctx->TransformFeedback.CurrentObject->Paused) { 794fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 79539c13a115eb45fb6c711cd86cda3a0c178975b52Brian Paul "glBindTransformFeedback(transform is active, or not paused)"); 796fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 797fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 798fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 79914bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšák obj = _mesa_lookup_transform_feedback_object(ctx, name); 800fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!obj) { 801fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 802fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul "glBindTransformFeedback(name=%u)", name); 803fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 804fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 805fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 806fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul reference_transform_feedback_object(&ctx->TransformFeedback.CurrentObject, 807fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj); 808fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 809fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 810fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 811fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 812fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Delete the given transform feedback objects. 813fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 814fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 815fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid GLAPIENTRY 816fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names) 817fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 818fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GLint i; 819fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 820fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 821fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ASSERT_OUTSIDE_BEGIN_END(ctx); 822fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 823fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (n < 0) { 824fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteTransformFeedbacks(n < 0)"); 825fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 826fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 827fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 828fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!names) 829fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 830fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 831fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul for (i = 0; i < n; i++) { 832fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (names[i] > 0) { 833fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj 83414bb957b996dcc5392b8fa589bd3ffa5c55cb6b4Marek Olšák = _mesa_lookup_transform_feedback_object(ctx, names[i]); 835fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj) { 836fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (obj->Active) { 837fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 838fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul "glDeleteTransformFeedbacks(object %u is active)", 839fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul names[i]); 840fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 841fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 842fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_HashRemove(ctx->TransformFeedback.Objects, names[i]); 843fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul /* unref, but object may not be deleted until later */ 844fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul reference_transform_feedback_object(&obj, NULL); 845fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 846fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 847fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 848fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 849fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 850fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 851fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 852fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Pause transform feedback. 853fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 854fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 855fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid GLAPIENTRY 856fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_PauseTransformFeedback(void) 857fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 858fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 859fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 860fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 861fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 862fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 863fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!obj->Active || obj->Paused) { 864fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 865fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul "glPauseTransformFeedback(feedback not active or already paused)"); 866fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 867fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 868fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 869a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); 870fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Paused = GL_TRUE; 871fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 872fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->Driver.PauseTransformFeedback); 873fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.PauseTransformFeedback(ctx, obj); 874fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 875fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 876fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 877fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul/** 878fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Resume transform feedback. 879fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul * Part of GL_ARB_transform_feedback2. 880fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul */ 881fef6e36e0736a68e24d7844bae65a01de8359214Brian Paulvoid GLAPIENTRY 882fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul_mesa_ResumeTransformFeedback(void) 883fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul{ 884fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul struct gl_transform_feedback_object *obj; 885fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul GET_CURRENT_CONTEXT(ctx); 886fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 887fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj = ctx->TransformFeedback.CurrentObject; 888fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 889fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul if (!obj->Active || !obj->Paused) { 890fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul _mesa_error(ctx, GL_INVALID_OPERATION, 891076bd11112742ca615880f2c6dc6ed235ab37eb5Brian Paul "glResumeTransformFeedback(feedback not active or not paused)"); 892fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul return; 893fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul } 894fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 895a98ceee0ee3692783047c6f8f9f6bf6afbf4dd3bPaul Berry FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); 896fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul obj->Paused = GL_FALSE; 897fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 898fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul assert(ctx->Driver.ResumeTransformFeedback); 899fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul ctx->Driver.ResumeTransformFeedback(ctx, obj); 900fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul} 901fef6e36e0736a68e24d7844bae65a01de8359214Brian Paul 902b093016bd0660cc4ac6142aa8d4d6add5b6bfce8Chia-I Wu#endif /* FEATURE_EXT_transform_feedback */ 903