[PATCH] dri3, i915, i965: Add __DRI_IMAGE_FOURCC_SARGB8888

[Keith Packard <keithp@keithp.com>]

The __DRIimage createImageFromFds function takes a fourcc code, but there was
no fourcc code that match __DRI_IMAGE_FORMAT_SARGB8. This adds a define for
that format, adds a translation in DRI3 from __DRI_IMAGE_FORMAT_SARGB8 to
__DRI_IMAGE_FOURCC_SARGB8888 and then adds translations *back* to
__IMAGE_FORMAT_SARGB8 in both the i915 and i965 drivers.

I'll refrain from comments on whether I think having two separate sets of
format defines in dri_interface.h is a good idea or not...

Signed-off-by: Keith Packard <keithp@keithp.com>
---

This gets iceweasel running with the GL compositor enabled.

 include/GL/internal/dri_interface.h      | 1 +
 src/glx/dri3_glx.c                       | 1 +
 src/mesa/drivers/dri/i915/intel_screen.c | 3 +++
 src/mesa/drivers/dri/i965/intel_screen.c | 3 +++
 4 files changed, 8 insertions(+)

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index b012570..a4387c4 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -1034,6 +1034,7 @@ struct __DRIdri2ExtensionRec {
 #define __DRI_IMAGE_FOURCC_XRGB8888	0x34325258
 #define __DRI_IMAGE_FOURCC_ABGR8888	0x34324241
 #define __DRI_IMAGE_FOURCC_XBGR8888	0x34324258
+#define __DRI_IMAGE_FOURCC_SARGB8888    0x83324258
 #define __DRI_IMAGE_FOURCC_YUV410	0x39565559
 #define __DRI_IMAGE_FOURCC_YUV411	0x31315559
 #define __DRI_IMAGE_FOURCC_YUV420	0x32315559
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c
index b047cc8..5861317 100644
--- a/src/glx/dri3_glx.c
+++ b/src/glx/dri3_glx.c
@@ -890,6 +890,7 @@ image_format_to_fourcc(int format)
 
    /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
    switch (format) {
+   case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
    case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565;
    case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888;
    case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888;
diff --git a/src/mesa/drivers/dri/i915/intel_screen.c b/src/mesa/drivers/dri/i915/intel_screen.c
index 7f1fc6b..2dd2bc7 100644
--- a/src/mesa/drivers/dri/i915/intel_screen.c
+++ b/src/mesa/drivers/dri/i915/intel_screen.c
@@ -184,6 +184,9 @@ static struct intel_image_format intel_image_formats[] = {
    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 
+   { __DRI_IMAGE_FOURCC_SARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
+     { { 0, 0, 0, __DRI_IMAGE_FORMAT_SARGB8, 4 } } },
+
    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index e44d0f6..cf8c3e2 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -220,6 +220,9 @@ static struct intel_image_format intel_image_formats[] = {
    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 
+   { __DRI_IMAGE_FOURCC_SARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
+     { { 0, 0, 0, __DRI_IMAGE_FORMAT_SARGB8, 4 } } },
+
    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 
-- 
1.8.4.2