svga_pipe_clear.c revision 3192633d4abe262d413e41feb871fe8deed409d8
1/********************************************************** 2 * Copyright 2008-2009 VMware, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without 7 * restriction, including without limitation the rights to use, copy, 8 * modify, merge, publish, distribute, sublicense, and/or sell copies 9 * of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 **********************************************************/ 25 26#include "svga_cmd.h" 27 28#include "pipe/p_defines.h" 29#include "util/u_pack_color.h" 30 31#include "svga_context.h" 32#include "svga_state.h" 33 34 35static enum pipe_error 36try_clear(struct svga_context *svga, 37 unsigned buffers, 38 const float *rgba, 39 double depth, 40 unsigned stencil) 41{ 42 int ret = PIPE_OK; 43 SVGA3dRect rect = { 0, 0, 0, 0 }; 44 boolean restore_viewport = FALSE; 45 SVGA3dClearFlag flags = 0; 46 struct pipe_framebuffer_state *fb = &svga->curr.framebuffer; 47 unsigned color = 0; 48 49 ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR); 50 if (ret) 51 return ret; 52 53 if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) { 54 flags |= SVGA3D_CLEAR_COLOR; 55 util_pack_color(rgba, PIPE_FORMAT_A8R8G8B8_UNORM, &color); 56 57 rect.w = fb->cbufs[0]->width; 58 rect.h = fb->cbufs[0]->height; 59 } 60 61 if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) { 62 flags |= SVGA3D_CLEAR_DEPTH; 63 64 if (svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_Z24S8_UNORM) 65 flags |= SVGA3D_CLEAR_STENCIL; 66 67 rect.w = MAX2(rect.w, fb->zsbuf->width); 68 rect.h = MAX2(rect.h, fb->zsbuf->height); 69 } 70 71 if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) { 72 restore_viewport = TRUE; 73 ret = SVGA3D_SetViewport(svga->swc, &rect); 74 if (ret) 75 return ret; 76 } 77 78 ret = SVGA3D_ClearRect(svga->swc, flags, color, depth, stencil, 79 rect.x, rect.y, rect.w, rect.h); 80 if (ret != PIPE_OK) 81 return ret; 82 83 if (restore_viewport) { 84 memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect); 85 ret = SVGA3D_SetViewport(svga->swc, &rect); 86 } 87 88 return ret; 89} 90 91/** 92 * Clear the given surface to the specified value. 93 * No masking, no scissor (clear entire buffer). 94 */ 95void 96svga_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba, 97 double depth, unsigned stencil) 98{ 99 struct svga_context *svga = svga_context( pipe ); 100 int ret; 101 102 ret = try_clear( svga, buffers, rgba, depth, stencil ); 103 104 if (ret == PIPE_ERROR_OUT_OF_MEMORY) { 105 /* Flush command buffer and retry: 106 */ 107 svga_context_flush( svga, NULL ); 108 109 ret = try_clear( svga, buffers, rgba, depth, stencil ); 110 } 111 112 /* 113 * Mark target surfaces as dirty 114 * TODO Mark only cleared surfaces. 115 */ 116 svga_mark_surfaces_dirty(svga); 117 118 assert (ret == PIPE_OK); 119} 120