diff options
Diffstat (limited to 'src/mesa/main/context.c')
| -rw-r--r-- | src/mesa/main/context.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c index 83e5de47a88..51b024143ad 100644 --- a/src/mesa/main/context.c +++ b/src/mesa/main/context.c @@ -1695,7 +1695,39 @@ _mesa_set_mvp_with_dp4( struct gl_context *ctx, ctx->mvp_with_dp4 = flag; } +static GLboolean +blend_factor_is_dual_src(GLenum factor) +{ + return factor == GL_SRC1_COLOR || factor == GL_SRC1_ALPHA || + factor == GL_ONE_MINUS_SRC1_COLOR || factor == GL_ONE_MINUS_SRC1_ALPHA; +} +/* + * ARB_blend_func_extended - ERRORS section + * "The error INVALID_OPERATION is generated by Begin or any procedure that + * implicitly calls Begin if any draw buffer has a blend function requiring the + * second color input (SRC1_COLOR, ONE_MINUS_SRC1_COLOR, SRC1_ALPHA or + * ONE_MINUS_SRC1_ALPHA), and a framebuffer is bound that has more than + * the value of MAX_DUAL_SOURCE_DRAW_BUFFERS-1 active color attachements." + */ +static GLboolean +_mesa_check_blend_func_error(struct gl_context *ctx) +{ + GLuint i; + for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) { + if (blend_factor_is_dual_src(ctx->Color.Blend[i].SrcRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[i].DstRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[i].SrcA) || + blend_factor_is_dual_src(ctx->Color.Blend[i].DstA)) { + if (i >= ctx->Const.MaxDualSourceDrawBuffers) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "dual source blend on illegal attachment"); + return GL_FALSE; + } + } + } + return GL_TRUE; +} /** * Prior to drawing anything with glBegin, glDrawArrays, etc. this function @@ -1816,6 +1848,10 @@ _mesa_valid_to_render(struct gl_context *ctx, const char *where) return GL_FALSE; } + if (_mesa_check_blend_func_error(ctx) == GL_FALSE) { + return GL_FALSE; + } + #ifdef DEBUG if (ctx->Shader.Flags & GLSL_LOG) { struct gl_shader_program *shProg[MESA_SHADER_TYPES]; |