drawpix.c revision 20e4421fe3e938f5904d53661ce8d47163db491b
1/* 2 * Mesa 3-D graphics library 3 * Version: 7.1 4 * 5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25#include "glheader.h" 26#include "imports.h" 27#include "bufferobj.h" 28#include "context.h" 29#include "drawpix.h" 30#include "enums.h" 31#include "feedback.h" 32#include "framebuffer.h" 33#include "image.h" 34#include "readpix.h" 35#include "state.h" 36 37 38 39/** 40 * If a fragment program is enabled, check that it's valid. 41 * \return GL_TRUE if valid, GL_FALSE otherwise 42 */ 43static GLboolean 44valid_fragment_program(GLcontext *ctx) 45{ 46 return !(ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled); 47} 48 49 50#if _HAVE_FULL_GL 51 52/* 53 * Execute glDrawPixels 54 */ 55void GLAPIENTRY 56_mesa_DrawPixels( GLsizei width, GLsizei height, 57 GLenum format, GLenum type, const GLvoid *pixels ) 58{ 59 GET_CURRENT_CONTEXT(ctx); 60 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); 61 62 if (width < 0 || height < 0) { 63 _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" ); 64 return; 65 } 66 67 /* We're not using the current vertex program, and the driver may install 68 * it's own. 69 */ 70 _mesa_set_vp_override(ctx, GL_TRUE); 71 72 if (ctx->NewState) { 73 _mesa_update_state(ctx); 74 } 75 76 if (!valid_fragment_program(ctx)) { 77 _mesa_error(ctx, GL_INVALID_OPERATION, 78 "glDrawPixels (invalid fragment program)"); 79 goto end; 80 } 81 82 if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) { 83 /* the error was already recorded */ 84 goto end; 85 } 86 87 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { 88 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, 89 "glDrawPixels(incomplete framebuffer)" ); 90 goto end; 91 } 92 93 if (!ctx->Current.RasterPosValid) { 94 goto end; /* no-op, not an error */ 95 } 96 97 if (ctx->RenderMode == GL_RENDER) { 98 if (width > 0 && height > 0) { 99 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ 100 GLint x = IROUND(ctx->Current.RasterPos[0]); 101 GLint y = IROUND(ctx->Current.RasterPos[1]); 102 103 if (ctx->Unpack.BufferObj->Name) { 104 /* unpack from PBO */ 105 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1, 106 format, type, pixels)) { 107 _mesa_error(ctx, GL_INVALID_OPERATION, 108 "glDrawPixels(invalid PBO access)"); 109 goto end; 110 } 111 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) { 112 /* buffer is mapped - that's an error */ 113 _mesa_error(ctx, GL_INVALID_OPERATION, 114 "glDrawPixels(PBO is mapped)"); 115 goto end; 116 } 117 } 118 119 ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, 120 &ctx->Unpack, pixels); 121 } 122 } 123 else if (ctx->RenderMode == GL_FEEDBACK) { 124 /* Feedback the current raster pos info */ 125 FLUSH_CURRENT( ctx, 0 ); 126 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN ); 127 _mesa_feedback_vertex( ctx, 128 ctx->Current.RasterPos, 129 ctx->Current.RasterColor, 130 ctx->Current.RasterIndex, 131 ctx->Current.RasterTexCoords[0] ); 132 } 133 else { 134 ASSERT(ctx->RenderMode == GL_SELECT); 135 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */ 136 } 137 138end: 139 _mesa_set_vp_override(ctx, GL_FALSE); 140} 141 142 143void GLAPIENTRY 144_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height, 145 GLenum type ) 146{ 147 GET_CURRENT_CONTEXT(ctx); 148 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); 149 150 if (width < 0 || height < 0) { 151 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)"); 152 return; 153 } 154 155 if (type != GL_COLOR && type != GL_DEPTH && type != GL_STENCIL) { 156 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)", 157 _mesa_lookup_enum_by_nr(type)); 158 return; 159 } 160 161 /* We're not using the current vertex program, and the driver may install 162 * it's own. 163 */ 164 _mesa_set_vp_override(ctx, GL_TRUE); 165 166 if (ctx->NewState) { 167 _mesa_update_state(ctx); 168 } 169 170 if (!valid_fragment_program(ctx)) { 171 _mesa_error(ctx, GL_INVALID_OPERATION, 172 "glCopyPixels (invalid fragment program)"); 173 goto end; 174 } 175 176 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT || 177 ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { 178 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, 179 "glCopyPixels(incomplete framebuffer)" ); 180 goto end; 181 } 182 183 if (!_mesa_source_buffer_exists(ctx, type) || 184 !_mesa_dest_buffer_exists(ctx, type)) { 185 _mesa_error(ctx, GL_INVALID_OPERATION, 186 "glCopyPixels(missing source or dest buffer)"); 187 goto end; 188 } 189 190 if (!ctx->Current.RasterPosValid || width ==0 || height == 0) { 191 goto end; /* no-op, not an error */ 192 } 193 194 if (ctx->RenderMode == GL_RENDER) { 195 /* Round to satisfy conformance tests (matches SGI's OpenGL) */ 196 if (width > 0 && height > 0) { 197 GLint destx = IROUND(ctx->Current.RasterPos[0]); 198 GLint desty = IROUND(ctx->Current.RasterPos[1]); 199 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty, 200 type ); 201 } 202 } 203 else if (ctx->RenderMode == GL_FEEDBACK) { 204 FLUSH_CURRENT( ctx, 0 ); 205 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN ); 206 _mesa_feedback_vertex( ctx, 207 ctx->Current.RasterPos, 208 ctx->Current.RasterColor, 209 ctx->Current.RasterIndex, 210 ctx->Current.RasterTexCoords[0] ); 211 } 212 else { 213 ASSERT(ctx->RenderMode == GL_SELECT); 214 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */ 215 } 216 217end: 218 _mesa_set_vp_override(ctx, GL_FALSE); 219} 220 221#endif /* _HAVE_FULL_GL */ 222 223 224 225void GLAPIENTRY 226_mesa_Bitmap( GLsizei width, GLsizei height, 227 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove, 228 const GLubyte *bitmap ) 229{ 230 GET_CURRENT_CONTEXT(ctx); 231 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); 232 233 if (width < 0 || height < 0) { 234 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" ); 235 return; 236 } 237 238 if (!ctx->Current.RasterPosValid) { 239 return; /* do nothing */ 240 } 241 242 if (ctx->NewState) { 243 _mesa_update_state(ctx); 244 } 245 246 if (!valid_fragment_program(ctx)) { 247 _mesa_error(ctx, GL_INVALID_OPERATION, 248 "glBitmap (invalid fragment program)"); 249 return; 250 } 251 252 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { 253 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, 254 "glBitmap(incomplete framebuffer)"); 255 return; 256 } 257 258 if (ctx->RenderMode == GL_RENDER) { 259 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */ 260 const GLfloat epsilon = 0.0001F; 261 GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig); 262 GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig); 263 264 if (ctx->Unpack.BufferObj->Name) { 265 /* unpack from PBO */ 266 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1, 267 GL_COLOR_INDEX, GL_BITMAP, 268 (GLvoid *) bitmap)) { 269 _mesa_error(ctx, GL_INVALID_OPERATION, 270 "glBitmap(invalid PBO access)"); 271 return; 272 } 273 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) { 274 /* buffer is mapped - that's an error */ 275 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); 276 return; 277 } 278 } 279 280 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap ); 281 } 282#if _HAVE_FULL_GL 283 else if (ctx->RenderMode == GL_FEEDBACK) { 284 FLUSH_CURRENT(ctx, 0); 285 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN ); 286 _mesa_feedback_vertex( ctx, 287 ctx->Current.RasterPos, 288 ctx->Current.RasterColor, 289 ctx->Current.RasterIndex, 290 ctx->Current.RasterTexCoords[0] ); 291 } 292 else { 293 ASSERT(ctx->RenderMode == GL_SELECT); 294 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */ 295 } 296#endif 297 298 /* update raster position */ 299 ctx->Current.RasterPos[0] += xmove; 300 ctx->Current.RasterPos[1] += ymove; 301} 302