vrend: Add VIRGL_FORMAT_R8G8B8A8_SRGB format and test for more sRGB formats

This along with another patch allows us to expose
GL_[EXT|ARB]_framebuffer_sRGB on a GLES host.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/virgl_hw.h

@@ -85,6 +85,7 @@ enum virgl_formats {
    VIRGL_FORMAT_L8A8_SRGB               = 96,
    VIRGL_FORMAT_B8G8R8A8_SRGB           = 100,
    VIRGL_FORMAT_B8G8R8X8_SRGB           = 101,
+   VIRGL_FORMAT_R8G8B8A8_SRGB           = 104,
 
    /* compressed formats */
    VIRGL_FORMAT_DXT1_RGB                = 105,

src/vrend_formats.c

@@ -226,10 +226,10 @@ static struct vrend_format_table rgtc_formats[] = {
 };
 
 static struct vrend_format_table srgb_formats[] = {
-
   { VIRGL_FORMAT_B8G8R8X8_SRGB, GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_BYTE, RGB1_SWIZZLE },
   { VIRGL_FORMAT_B8G8R8A8_SRGB, GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
   { VIRGL_FORMAT_R8G8B8X8_SRGB, GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, RGB1_SWIZZLE },
+  { VIRGL_FORMAT_R8G8B8A8_SRGB, GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 
   { VIRGL_FORMAT_L8_SRGB, GL_SR8_EXT, GL_RED, GL_UNSIGNED_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_SRGB, GL_SRG8_EXT, GL_RG, GL_UNSIGNED_BYTE, RRRG_SWIZZLE },