freedreno/a4xx: add fake RGTC support (required for GL3)

[mesa.git] / src / gallium / drivers / freedreno / a4xx / fd4_format.c

diff --git a/src/gallium/drivers/freedreno/a4xx/fd4_format.c b/src/gallium/drivers/freedreno/a4xx/fd4_format.c
index 7ff3c8cb196711dc6836811d6466287ed46dbb21..087d04f3c7434fecefd985b2f824ed0daf0d939f 100644 (file)
--- a/src/gallium/drivers/freedreno/a4xx/fd4_format.c
+++ b/src/gallium/drivers/freedreno/a4xx/fd4_format.c
@@ -274,6 +274,16 @@ static struct fd4_format formats[PIPE_FORMAT_COUNT] = {
        _T(DXT3_SRGBA, DXT3, NONE, WZYX),
        _T(DXT5_RGBA,  DXT5, NONE, WZYX),
        _T(DXT5_SRGBA, DXT5, NONE, WZYX),
+
+       /* faked */
+       _T(RGTC1_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
+       _T(RGTC1_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
+       _T(RGTC2_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
+       _T(RGTC2_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
+       _T(LATC1_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
+       _T(LATC1_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
+       _T(LATC2_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
+       _T(LATC2_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
 };
 
 /* convert pipe format to vertex buffer format: */
@@ -316,6 +326,8 @@ fd4_pipe2fetchsize(enum pipe_format format)
 {
        if (format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT)
                format = PIPE_FORMAT_Z32_FLOAT;
+       else if (util_format_description(format)->layout == UTIL_FORMAT_LAYOUT_RGTC)
+               format = PIPE_FORMAT_R8G8B8A8_UNORM;
 
        switch (util_format_get_blocksizebits(format) / util_format_get_blockwidth(format)) {
        case 8:   return TFETCH4_1_BYTE;
@@ -331,6 +343,14 @@ fd4_pipe2fetchsize(enum pipe_format format)
        }
 }
 
+unsigned
+fd4_pipe2nblocksx(enum pipe_format format, unsigned width)
+{
+       if (util_format_description(format)->layout == UTIL_FORMAT_LAYOUT_RGTC)
+               format = PIPE_FORMAT_R8G8B8A8_UNORM;
+       return util_format_get_nblocksx(format, width);
+}
+
 /* we need to special case a bit the depth/stencil restore, because we are
  * using the texture sampler to blit into the depth/stencil buffer, *not*
  * into a color buffer.  Otherwise fd4_tex_swiz() will do the wrong thing,