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i965/meta: Support 16x MSAA in the meta stencil blit

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The destination rectangle is now drawn at 4x4 the size and the shader
code to calculate the sample number is adjusted accordingly.

Acked-by: Ben Widawsky <ben@bwidawsk.net>
This commit is contained in:
Neil Roberts 2015-09-11 18:09:46 +01:00
parent a680465428
commit 1a22b12fc5
1 changed files with 17 additions and 5 deletions
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22
src/mesa/drivers/dri/i965/brw_meta_stencil_blit.c
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@ -163,6 +163,13 @@ static const char *fs_tmpl =
" txl_coords.x = ((X & int(0xfff8)) >> 2) | (X & int(0x1));\n"
" txl_coords.y = ((Y & int(0xfffc)) >> 1) | (Y & int(0x1));\n"
" sample_index = (X & 0x4) | (Y & 0x2) | ((X & 0x2) >> 1);\n"
" break;\n"
" case 16:\n"
" txl_coords.x = ((X & int(0xfff8)) >> 2) | (X & int(0x1));\n"
" txl_coords.y = ((Y & int(0xfff8)) >> 2) | (Y & int(0x1));\n"
" sample_index = (((Y & 0x4) << 1) | (X & 0x4) | (Y & 0x2) |\n"
" ((X & 0x2) >> 1));\n"
" break;\n"
" }\n"
"}\n"
"\n"
@ -313,11 +320,16 @@ adjust_msaa(struct blit_dims *dims, int num_samples)
dims->dst_x0 *= 2;
dims->dst_x1 *= 2;
} else if (num_samples) {
const int x_num_samples = num_samples / 2;
dims->dst_x0 = ROUND_DOWN_TO(dims->dst_x0 * x_num_samples, num_samples);
dims->dst_y0 = ROUND_DOWN_TO(dims->dst_y0 * 2, 4);
dims->dst_x1 = ALIGN(dims->dst_x1 * x_num_samples, num_samples);
dims->dst_y1 = ALIGN(dims->dst_y1 * 2, 4);
const int y_num_samples = num_samples >= 16 ? 4 : 2;
const int x_num_samples = num_samples / y_num_samples;
dims->dst_x0 = ROUND_DOWN_TO(dims->dst_x0 * x_num_samples,
x_num_samples * 2);
dims->dst_y0 = ROUND_DOWN_TO(dims->dst_y0 * y_num_samples,
y_num_samples * 2);
dims->dst_x1 = ALIGN(dims->dst_x1 * x_num_samples,
x_num_samples * 2);
dims->dst_y1 = ALIGN(dims->dst_y1 * y_num_samples,
y_num_samples * 2);
}
}