[Mesa-dev] [PATCH] st/mesa: add more fallback gallium formats for GL integer formats

[Brian Paul]

The VMware driver has a limited set of integer texture formats.  We
often have to fall back to 4-component formats when 1- or 2-component
formats are missing.

This fixes about 8 integer texture Piglit tests with the VMware driver
on Linux.  We've had this code in-house for a long time but I guess it
was never up-streamed to Mesa master.

This shouldn't regress any other drivers since we're either choosing
an earlier format in the list, or failing anyway.
---
 src/mesa/state_tracker/st_format.c | 50 +++++++++++++++++++-------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/src/mesa/state_tracker/st_format.c b/src/mesa/state_tracker/st_format.c
index 7901d50..012f1a4 100644
--- a/src/mesa/state_tracker/st_format.c
+++ b/src/mesa/state_tracker/st_format.c
@@ -1186,7 +1186,7 @@ static const struct format_mapping format_map[] = {
    },
    {
       { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
-      { PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
+      { PIPE_FORMAT_L8_UNORM, PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGB_FORMATS }
    },
 
    /* basic Luminance/Alpha formats */
@@ -1682,101 +1682,101 @@ static const struct format_mapping format_map[] = {
    {
       { GL_ALPHA_INTEGER_EXT,
         GL_ALPHA8I_EXT, 0 },
-      { PIPE_FORMAT_A8_SINT, 0 }
+      { PIPE_FORMAT_A8_SINT, PIPE_FORMAT_R8G8B8A8_SINT, 0 }
    },
    {
       { GL_ALPHA16I_EXT, 0 },
-      { PIPE_FORMAT_A16_SINT, 0 }
+      { PIPE_FORMAT_A16_SINT, PIPE_FORMAT_R16G16B16A16_SINT, 0 }
    },
    {
       { GL_ALPHA32I_EXT, 0 },
-      { PIPE_FORMAT_A32_SINT, 0 }
+      { PIPE_FORMAT_A32_SINT, PIPE_FORMAT_R32G32B32A32_SINT, 0 }
    },
    {
       { GL_ALPHA8UI_EXT, 0 },
-      { PIPE_FORMAT_A8_UINT, 0 }
+      { PIPE_FORMAT_A8_UINT, PIPE_FORMAT_R8G8B8A8_UINT, 0 }
    },
    {
       { GL_ALPHA16UI_EXT, 0 },
-      { PIPE_FORMAT_A16_UINT, 0 }
+      { PIPE_FORMAT_A16_UINT, PIPE_FORMAT_R16G16B16A16_UINT, 0 }
    },
    {
       { GL_ALPHA32UI_EXT, 0 },
-      { PIPE_FORMAT_A32_UINT, 0 }
+      { PIPE_FORMAT_A32_UINT, PIPE_FORMAT_R32G32B32A32_UINT, 0 }
    },
    {
       { GL_INTENSITY8I_EXT, 0 },
-      { PIPE_FORMAT_I8_SINT, 0 }
+      { PIPE_FORMAT_I8_SINT, PIPE_FORMAT_R8G8B8A8_SINT, 0 }
    },
    {
       { GL_INTENSITY16I_EXT, 0 },
-      { PIPE_FORMAT_I16_SINT, 0 }
+      { PIPE_FORMAT_I16_SINT, PIPE_FORMAT_R16G16B16A16_SINT, 0 }
    },
    {
       { GL_INTENSITY32I_EXT, 0 },
-      { PIPE_FORMAT_I32_SINT, 0 }
+      { PIPE_FORMAT_I32_SINT, PIPE_FORMAT_R32G32B32A32_SINT, 0 }
    },
    {
       { GL_INTENSITY8UI_EXT, 0 },
-      { PIPE_FORMAT_I8_UINT, 0 }
+      { PIPE_FORMAT_I8_UINT, PIPE_FORMAT_R8G8B8A8_UINT, 0 }
    },
    {
       { GL_INTENSITY16UI_EXT, 0 },
-      { PIPE_FORMAT_I16_UINT, 0 }
+      { PIPE_FORMAT_I16_UINT, PIPE_FORMAT_R16G16B16A16_UINT, 0 }
    },
    {
       { GL_INTENSITY32UI_EXT, 0 },
-      { PIPE_FORMAT_I32_UINT, 0 }
+      { PIPE_FORMAT_I32_UINT, PIPE_FORMAT_R32G32B32A32_UINT, 0 }
    },
    {
       { GL_LUMINANCE8I_EXT, 0 },
-      { PIPE_FORMAT_L8_SINT, 0 }
+      { PIPE_FORMAT_L8_SINT, PIPE_FORMAT_R8G8B8A8_SINT, 0 }
    },
    {
       { GL_LUMINANCE16I_EXT, 0 },
-      { PIPE_FORMAT_L16_SINT, 0 }
+      { PIPE_FORMAT_L16_SINT, PIPE_FORMAT_R16G16B16A16_SINT, 0 }
    },
    {
       { GL_LUMINANCE32I_EXT, 0 },
-      { PIPE_FORMAT_L32_SINT, 0 }
+      { PIPE_FORMAT_L32_SINT, PIPE_FORMAT_R32G32B32A32_SINT, 0 }
    },
    {
       { GL_LUMINANCE_INTEGER_EXT,
         GL_LUMINANCE8UI_EXT, 0 },
-      { PIPE_FORMAT_L8_UINT, 0 }
+      { PIPE_FORMAT_L8_UINT, PIPE_FORMAT_R8G8B8A8_UINT, 0 }
    },
    {
       { GL_LUMINANCE16UI_EXT, 0 },
-      { PIPE_FORMAT_L16_UINT, 0 }
+      { PIPE_FORMAT_L16_UINT, PIPE_FORMAT_R16G16B16A16_UINT, 0 }
    },
    {
       { GL_LUMINANCE32UI_EXT, 0 },
-      { PIPE_FORMAT_L32_UINT, 0 }
+      { PIPE_FORMAT_L32_UINT, PIPE_FORMAT_R32G32B32A32_UINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA_INTEGER_EXT,
         GL_LUMINANCE_ALPHA8I_EXT, 0 },
-      { PIPE_FORMAT_L8A8_SINT, 0 }
+      { PIPE_FORMAT_L8A8_SINT, PIPE_FORMAT_R8G8B8A8_SINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA16I_EXT, 0 },
-      { PIPE_FORMAT_L16A16_SINT, 0 }
+      { PIPE_FORMAT_L16A16_SINT, PIPE_FORMAT_R16G16B16A16_SINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA32I_EXT, 0 },
-      { PIPE_FORMAT_L32A32_SINT, 0 }
+      { PIPE_FORMAT_L32A32_SINT, PIPE_FORMAT_R32G32B32A32_SINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA8UI_EXT, 0 },
-      { PIPE_FORMAT_L8A8_UINT, 0 }
+      { PIPE_FORMAT_L8A8_UINT, PIPE_FORMAT_R8G8B8A8_UINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA16UI_EXT, 0 },
-      { PIPE_FORMAT_L16A16_UINT, 0 }
+      { PIPE_FORMAT_L16A16_UINT, PIPE_FORMAT_R16G16B16A16_UINT, 0 }
    },
    {
       { GL_LUMINANCE_ALPHA32UI_EXT, 0 },
-      { PIPE_FORMAT_L32A32_UINT, 0 }
+      { PIPE_FORMAT_L32A32_UINT, PIPE_FORMAT_R32G32B32A32_UINT, 0 }
    },
    {
       { GL_RGB16I_EXT, 0 },
-- 
1.9.1