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r300g: add support for R8G8 colorbuffers

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The hw swizzles have been obtained by a brute force approach,
and only C0 and C2 are stored in UV88, the other channels are
ignored.

R16G16 is going to be a lot trickier.
This commit is contained in:
Marek Olšák 2010-10-02 21:42:22 +02:00
parent 71a079fb4e
commit e75bce026c
1 changed files with 11 additions and 1 deletions
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12
src/gallium/drivers/r300/r300_texture.c
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@ -369,6 +369,10 @@ static uint32_t r300_translate_colorformat(enum pipe_format format)
return R300_COLOR_FORMAT_I8;
/* 16-bit buffers. */
case PIPE_FORMAT_R8G8_UNORM:
case PIPE_FORMAT_R8G8_SNORM:
return R300_COLOR_FORMAT_UV88;
case PIPE_FORMAT_B5G6R5_UNORM:
return R300_COLOR_FORMAT_RGB565;
@ -488,7 +492,7 @@ static uint32_t r300_translate_out_fmt(enum pipe_format format)
/* Add swizzles and return. */
switch (format) {
/* 8-bit outputs.
/* 8-bit outputs, one channel.
* COLORFORMAT_I8 stores the C2 component. */
case PIPE_FORMAT_A8_UNORM:
return modifier | R300_C2_SEL_A;
@ -498,6 +502,12 @@ static uint32_t r300_translate_out_fmt(enum pipe_format format)
case PIPE_FORMAT_R8_SNORM:
return modifier | R300_C2_SEL_R;
/* 16-bit outputs, two channels.
* COLORFORMAT_UV88 stores C2 and C0. */
case PIPE_FORMAT_R8G8_UNORM:
case PIPE_FORMAT_R8G8_SNORM:
return modifier | R300_C0_SEL_G | R300_C2_SEL_R;
/* BGRA outputs. */
case PIPE_FORMAT_B5G6R5_UNORM:
case PIPE_FORMAT_B5G5R5A1_UNORM: