On 06/27/2012 05:51 PM, Paul Berry wrote:
The meta-ops _mesa_meta_Clear() and _mesa_meta_glsl_Clear() need to ignore the state of GL_SAMPLE_ALPHA_TO_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE, GL_SAMPLE_COVERAGE, GL_SAMPLE_COVERAGE_VALUE, and GL_SAMPLE_COVERAGE_INVERT when clearing multisampled buffers. The easiest way to accomplish this is to disable GL_MULTISAMPLE during the clear meta-ops.Note: this patch also causes GL_MULTISAMPLE to be disabled during _mesa_meta_GenerateMipmap() and _mesa_meta_GetTexImage() (since those two meta-ops use MESA_META_ALL). Arguably this isn't strictly necessary, since those meta-ops use their own non-MSAA fbo's, but it shouldn't do any harm. Fixes Piglit tests "EXT_framebuffer_multisample/clear {2,4} {color,stencil}" on i965. --- src/mesa/drivers/common/meta.c | 17 ++++++++++++++++- src/mesa/drivers/common/meta.h | 1 + 2 files changed, 17 insertions(+), 1 deletions(-) diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index be7141a..5e9d795 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -181,6 +181,9 @@ struct save_state struct gl_feedback Feedback; #endif + /** MESA_META_MULTISAMPLE */ + GLboolean MultisampleEnabled; + /** Miscellaneous (always disabled) */ GLboolean Lighting; GLboolean RasterDiscard; @@ -733,6 +736,12 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state) } #endif + if (state& MESA_META_MULTISAMPLE) { + save->MultisampleEnabled = ctx->Multisample.Enabled; + if (ctx->Multisample.Enabled) + _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_FALSE); + } + /* misc */ { save->Lighting = ctx->Light.Enabled; @@ -1018,6 +1027,11 @@ _mesa_meta_end(struct gl_context *ctx) } #endif + if (state& MESA_META_MULTISAMPLE) { + if (ctx->Multisample.Enabled != save->MultisampleEnabled) + _mesa_set_enable(ctx, GL_MULTISAMPLE, save->MultisampleEnabled); + } + /* misc */ if (save->Lighting) { _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE); @@ -1902,7 +1916,8 @@ _mesa_meta_glsl_Clear(struct gl_context *ctx, GLbitfield buffers) MESA_META_VERTEX | MESA_META_VIEWPORT | MESA_META_CLIP | - MESA_META_CLAMP_FRAGMENT_COLOR); + MESA_META_CLAMP_FRAGMENT_COLOR | + MESA_META_MULTISAMPLE); if (!(buffers& BUFFER_BITS_COLOR)) { /* We'll use colormask to disable color writes. Otherwise, diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h index 7a80b1d..d8dfb56 100644 --- a/src/mesa/drivers/common/meta.h +++ b/src/mesa/drivers/common/meta.h @@ -55,6 +55,7 @@ #define MESA_META_CONDITIONAL_RENDER 0x20000 #define MESA_META_CLIP 0x40000 #define MESA_META_SELECT_FEEDBACK 0x80000 +#define MESA_META_MULTISAMPLE 0x100000 /**\}*/ extern void
Looks good. Reviewed-by: Brian Paul <bri...@vmware.com> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
