- case GL_MODELVIEW:
- case GL_PROJECTION:
- case GL_TEXTURE:
- case GL_COLOR:
- if (ctx->Transform.MatrixMode == mode)
- return;
- ctx->Transform.MatrixMode = mode;
- FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glMatrixMode" );
+ case GL_MODELVIEW:
+ ctx->CurrentStack = &ctx->ModelviewMatrixStack;
+ break;
+ case GL_PROJECTION:
+ ctx->CurrentStack = &ctx->ProjectionMatrixStack;
+ break;
+ case GL_TEXTURE:
+ /* This error check is disabled because if we're called from
+ * glPopAttrib() when the active texture unit is >= MaxTextureCoordUnits
+ * we'll generate an unexpected error.
+ * From the GL_ARB_vertex_shader spec it sounds like we should instead
+ * do error checking in other places when we actually try to access
+ * texture matrices beyond MaxTextureCoordUnits.
+ */
+#if 0
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glMatrixMode(invalid tex unit %d)",
+ ctx->Texture.CurrentUnit);
+ return;
+ }
+#endif
+ ASSERT(ctx->Texture.CurrentUnit < Elements(ctx->TextureMatrixStack));
+ ctx->CurrentStack = &ctx->TextureMatrixStack[ctx->Texture.CurrentUnit];
+ break;
+ case GL_COLOR:
+ ctx->CurrentStack = &ctx->ColorMatrixStack;
+ break;
+ case GL_MATRIX0_NV:
+ case GL_MATRIX1_NV:
+ case GL_MATRIX2_NV:
+ case GL_MATRIX3_NV:
+ case GL_MATRIX4_NV:
+ case GL_MATRIX5_NV:
+ case GL_MATRIX6_NV:
+ case GL_MATRIX7_NV:
+ if (ctx->Extensions.NV_vertex_program) {
+ ctx->CurrentStack = &ctx->ProgramMatrixStack[mode - GL_MATRIX0_NV];
+ }
+ else {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
+ return;
+ }
+ break;
+ case GL_MATRIX0_ARB:
+ case GL_MATRIX1_ARB:
+ case GL_MATRIX2_ARB:
+ case GL_MATRIX3_ARB:
+ case GL_MATRIX4_ARB:
+ case GL_MATRIX5_ARB:
+ case GL_MATRIX6_ARB:
+ case GL_MATRIX7_ARB:
+ if (ctx->Extensions.ARB_vertex_program ||
+ ctx->Extensions.ARB_fragment_program) {
+ const GLuint m = mode - GL_MATRIX0_ARB;
+ if (m > ctx->Const.MaxProgramMatrices) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glMatrixMode(GL_MATRIX%d_ARB)", m);
+ return;
+ }
+ ctx->CurrentStack = &ctx->ProgramMatrixStack[m];
+ }
+ else {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
+ return;
+ }
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
+ return;