diff options
| author | Chad Versace <[email protected]> | 2011-11-15 07:10:18 -0800 |
|---|---|---|
| committer | Chad Versace <[email protected]> | 2011-11-15 08:00:29 -0800 |
| commit | dc4c3a31c64aae2c3d76ccbd5bf54d04a1d5d041 (patch) | |
| tree | 7222d7f08def7d8b309f97c9332778a04f968d87 /src/mesa/drivers | |
| parent | 1161facaf9bb14086807714c72a7554ed229a52f (diff) | |
intel: Simplify stencil detiling arithmetic
When calculating the y offset needed for detiling window system stencil
buffers, replace the term
region->height * 2 + region->height % 2 - 1
with
rb->Height - 1 .
The two terms are incidentally equivalent due to some out-of-date,
incorrect code in the Intel DRI2 glue for DDX. (See
intel_process_dri2_buffer_with_separate_stencil(), line ``buffer_height /=
2;``).
Note: This is a candidate for the 7.11 branch (only the intel_span.c hunk).
Signed-off-by: Chad Versace <[email protected]>
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/intel/intel_fbo.c | 6 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/intel/intel_span.c | 3 |
2 files changed, 3 insertions, 6 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_fbo.c b/src/mesa/drivers/dri/intel/intel_fbo.c index dbd5163b5f1..a724f1d97b3 100644 --- a/src/mesa/drivers/dri/intel/intel_fbo.c +++ b/src/mesa/drivers/dri/intel/intel_fbo.c @@ -267,9 +267,8 @@ intel_map_renderbuffer_s8(struct gl_context *ctx, irb->map_h = h; /* Flip the Y axis for the default framebuffer. */ - int region_h = irb->region->height; int y_flip = (rb->Name == 0) ? -1 : 1; - int y_bias = (rb->Name == 0) ? (region_h * 2 + region_h % 2 - 1) : 0; + int y_bias = (rb->Name == 0) ? (rb->Height - 1) : 0; irb->map_buffer = malloc(w * h); untiled_s8_map = irb->map_buffer; @@ -442,9 +441,8 @@ intel_unmap_renderbuffer_s8(struct gl_context *ctx, uint8_t *tiled_s8_map = irb->region->bo->virtual; /* Flip the Y axis for the default framebuffer. */ - int region_h = irb->region->height; int y_flip = (rb->Name == 0) ? -1 : 1; - int y_bias = (rb->Name == 0) ? (region_h * 2 + region_h % 2 - 1) : 0; + int y_bias = (rb->Name == 0) ? (rb->Height - 1) : 0; for (uint32_t pix_y = 0; pix_y < irb->map_h; pix_y++) { for (uint32_t pix_x = 0; pix_x < irb->map_w; pix_x++) { diff --git a/src/mesa/drivers/dri/intel/intel_span.c b/src/mesa/drivers/dri/intel/intel_span.c index 271d2e15a83..31f2828c395 100644 --- a/src/mesa/drivers/dri/intel/intel_span.c +++ b/src/mesa/drivers/dri/intel/intel_span.c @@ -141,10 +141,9 @@ intel_set_span_functions(struct intel_context *intel, struct intel_renderbuffer *irb = intel_renderbuffer(rb); \ uint8_t *buf = irb->region->bo->virtual; \ unsigned stride = irb->region->pitch; \ - unsigned height = irb->region->height; \ bool flip = rb->Name == 0; \ int y_scale = flip ? -1 : 1; \ - int y_bias = flip ? (height * 2 + height % 2 - 1) : 0; \ + int y_bias = flip ? (rb->Height - 1) : 0; \ #undef Y_FLIP #define Y_FLIP(y) (y_scale * (y) + y_bias) |