drawpix.c revision 23caf20169ac38436ee9c13914f1d6aa7cf6bb5e
1/* $Id: drawpix.c,v 1.45 2000/11/16 21:05:34 keithw Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.5 6 * 7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 28#ifdef PC_HEADER 29#include "all.h" 30#else 31#include "glheader.h" 32#include "colormac.h" 33#include "context.h" 34#include "drawpix.h" 35#include "feedback.h" 36#include "macros.h" 37#include "mem.h" 38#include "mmath.h" 39#include "state.h" 40#include "types.h" 41#include "swrast/swrast.h" 42#endif 43 44 45 46 47 48/* 49 * Execute glDrawPixels 50 */ 51void 52_mesa_DrawPixels( GLsizei width, GLsizei height, 53 GLenum format, GLenum type, const GLvoid *pixels ) 54{ 55 GET_CURRENT_CONTEXT(ctx); 56 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx, "_mesa_DrawPixels" ); 57 58 if (ctx->RenderMode==GL_RENDER) { 59 GLint x, y; 60 if (!pixels || !ctx->Current.RasterPosValid) { 61 return; 62 } 63 64 if (ctx->NewState) { 65 gl_update_state(ctx); 66 } 67 68 x = (GLint) (ctx->Current.RasterPos[0] + 0.5F); 69 y = (GLint) (ctx->Current.RasterPos[1] + 0.5F); 70 71 ctx->OcclusionResult = GL_TRUE; 72 73 /* see if device driver can do the drawpix */ 74 RENDER_START(ctx); 75 76 if (ctx->Driver.DrawPixels 77 && (*ctx->Driver.DrawPixels)(ctx, x, y, width, height, format, type, 78 &ctx->Unpack, pixels)) { 79 /* finished */ 80 } else 81 _swrast_DrawPixels( ctx, x, y, width, height, format, type, 82 &ctx->Unpack, pixels ); 83 84 RENDER_FINISH(ctx); 85 } 86 else if (ctx->RenderMode==GL_FEEDBACK) { 87 if (ctx->Current.RasterPosValid) { 88 GLfloat color[4]; 89 GLfloat texcoord[4], invq; 90 91 FLUSH_TNL( ctx, FLUSH_UPDATE_CURRENT ); 92 93 color[0] = CHAN_TO_FLOAT(ctx->Current.Color[0]); 94 color[1] = CHAN_TO_FLOAT(ctx->Current.Color[1]); 95 color[2] = CHAN_TO_FLOAT(ctx->Current.Color[2]); 96 color[3] = CHAN_TO_FLOAT(ctx->Current.Color[3]); 97 invq = 1.0F / ctx->Current.Texcoord[0][3]; 98 texcoord[0] = ctx->Current.Texcoord[0][0] * invq; 99 texcoord[1] = ctx->Current.Texcoord[0][1] * invq; 100 texcoord[2] = ctx->Current.Texcoord[0][2] * invq; 101 texcoord[3] = ctx->Current.Texcoord[0][3]; 102 FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN ); 103 gl_feedback_vertex( ctx, 104 ctx->Current.RasterPos, 105 color, ctx->Current.Index, texcoord ); 106 } 107 } 108 else if (ctx->RenderMode==GL_SELECT) { 109 if (ctx->Current.RasterPosValid) { 110 gl_update_hitflag( ctx, ctx->Current.RasterPos[2] ); 111 } 112 } 113} 114 115