[virglrenderer-devel] [PATCH 6/6] vrend: Use RGB1 swizzle for formats with "don't care" components

[Alexandros Frantzis]

The swizzle ensures we read/write correct values from/to such formats
during blitting.

Fixes:

dEQP-GLES3.functional.fbo.blit.conversion.rgb8_to_rgb10_a2
dEQP-GLES3.functional.fbo.blit.conversion.rgb8_to_rgba4
dEQP-GLES3.functional.fbo.blit.conversion.rgb8_to_rgba8
dEQP-GLES3.functional.fbo.blit.default_framebuffer.rgb8
dEQP-GLES3.functional.fbo.blit.default_framebuffer.rgb8_linear_scale_blit_to_default
dEQP-GLES3.functional.fbo.blit.default_framebuffer.rgb8_nearest_scale_blit_to_default

Signed-off-by: Alexandros Frantzis <alexandros.frantzis at collabora.com>
---
 src/vrend_formats.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/src/vrend_formats.c b/src/vrend_formats.c
index 724551a..999dc41 100644
--- a/src/vrend_formats.c
+++ b/src/vrend_formats.c
@@ -31,14 +31,15 @@
 #define NO_SWIZZLE { SWIZZLE_INVALID, SWIZZLE_INVALID, SWIZZLE_INVALID, SWIZZLE_INVALID }
 #define RRR1_SWIZZLE { PIPE_SWIZZLE_RED, PIPE_SWIZZLE_RED, PIPE_SWIZZLE_RED, PIPE_SWIZZLE_ONE }
 #define RRRG_SWIZZLE { PIPE_SWIZZLE_RED, PIPE_SWIZZLE_RED, PIPE_SWIZZLE_RED, PIPE_SWIZZLE_GREEN }
+#define RGB1_SWIZZLE { PIPE_SWIZZLE_RED, PIPE_SWIZZLE_GREEN, PIPE_SWIZZLE_BLUE, PIPE_SWIZZLE_ONE }
 
 /* fill the format table */
 static struct vrend_format_table base_rgba_formats[] =
   {
-    { VIRGL_FORMAT_B8G8R8X8_UNORM, GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+    { VIRGL_FORMAT_B8G8R8X8_UNORM, GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE, RGB1_SWIZZLE },
     { VIRGL_FORMAT_B8G8R8A8_UNORM, GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 
-    { VIRGL_FORMAT_R8G8B8X8_UNORM, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+    { VIRGL_FORMAT_R8G8B8X8_UNORM, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, RGB1_SWIZZLE },
     { VIRGL_FORMAT_R8G8B8A8_UNORM, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 
     { VIRGL_FORMAT_A8R8G8B8_UNORM, GL_RGBA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8, NO_SWIZZLE },
@@ -47,14 +48,14 @@ static struct vrend_format_table base_rgba_formats[] =
     { VIRGL_FORMAT_A8B8G8R8_UNORM, GL_RGBA8, GL_ABGR_EXT, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 
     { VIRGL_FORMAT_B4G4R4A4_UNORM, GL_RGBA4, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV, NO_SWIZZLE },
-    { VIRGL_FORMAT_B4G4R4X4_UNORM, GL_RGBA4, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV, NO_SWIZZLE },
-    { VIRGL_FORMAT_B5G5R5X1_UNORM, GL_RGB5_A1, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV, NO_SWIZZLE },
+    { VIRGL_FORMAT_B4G4R4X4_UNORM, GL_RGBA4, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV, RGB1_SWIZZLE },
+    { VIRGL_FORMAT_B5G5R5X1_UNORM, GL_RGB5_A1, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV, RGB1_SWIZZLE },
     { VIRGL_FORMAT_B5G5R5A1_UNORM, GL_RGB5_A1, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV, NO_SWIZZLE },
 
     { VIRGL_FORMAT_B5G6R5_UNORM, GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, NO_SWIZZLE },
     { VIRGL_FORMAT_B2G3R3_UNORM, GL_R3_G3_B2, GL_RGB, GL_UNSIGNED_BYTE_3_3_2, NO_SWIZZLE },
 
-    { VIRGL_FORMAT_R16G16B16X16_UNORM, GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT, NO_SWIZZLE },
+    { VIRGL_FORMAT_R16G16B16X16_UNORM, GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT, RGB1_SWIZZLE },
 
     { VIRGL_FORMAT_R16G16B16A16_UNORM, GL_RGBA16, GL_RGBA, GL_UNSIGNED_SHORT, NO_SWIZZLE },
   };
@@ -184,13 +185,13 @@ static struct vrend_format_table snorm_formats[] = {
   { VIRGL_FORMAT_R8G8_SNORM, GL_RG8_SNORM, GL_RG, GL_BYTE, NO_SWIZZLE },
 
   { VIRGL_FORMAT_R8G8B8A8_SNORM, GL_RGBA8_SNORM, GL_RGBA, GL_BYTE, NO_SWIZZLE },
-  { VIRGL_FORMAT_R8G8B8X8_SNORM, GL_RGBA8_SNORM, GL_RGBA, GL_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_R8G8B8X8_SNORM, GL_RGBA8_SNORM, GL_RGBA, GL_BYTE, RGB1_SWIZZLE },
 
   { VIRGL_FORMAT_R16_SNORM, GL_R16_SNORM, GL_RED, GL_SHORT, NO_SWIZZLE },
   { VIRGL_FORMAT_R16G16_SNORM, GL_RG16_SNORM, GL_RG, GL_SHORT, NO_SWIZZLE },
   { VIRGL_FORMAT_R16G16B16A16_SNORM, GL_RGBA16_SNORM, GL_RGBA, GL_SHORT, NO_SWIZZLE },
 
-  { VIRGL_FORMAT_R16G16B16X16_SNORM, GL_RGBA16_SNORM, GL_RGBA, GL_SHORT, NO_SWIZZLE },
+  { VIRGL_FORMAT_R16G16B16X16_SNORM, GL_RGBA16_SNORM, GL_RGBA, GL_SHORT, RGB1_SWIZZLE },
 };
 
 static struct vrend_format_table snorm_la_formats[] = {
@@ -226,19 +227,19 @@ 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, NO_SWIZZLE },
+  { 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, NO_SWIZZLE },
+  { VIRGL_FORMAT_R8G8B8X8_SRGB, GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, RGB1_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 },
 };
 
 static struct vrend_format_table bit10_formats[] = {
-  { VIRGL_FORMAT_B10G10R10X2_UNORM, GL_RGB10_A2, GL_BGRA, GL_UNSIGNED_INT_2_10_10_10_REV, NO_SWIZZLE },
+  { VIRGL_FORMAT_B10G10R10X2_UNORM, GL_RGB10_A2, GL_BGRA, GL_UNSIGNED_INT_2_10_10_10_REV, RGB1_SWIZZLE },
   { VIRGL_FORMAT_B10G10R10A2_UNORM, GL_RGB10_A2, GL_BGRA, GL_UNSIGNED_INT_2_10_10_10_REV, NO_SWIZZLE },
   { VIRGL_FORMAT_B10G10R10A2_UINT, GL_RGB10_A2UI, GL_BGRA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, NO_SWIZZLE },
-  { VIRGL_FORMAT_R10G10B10X2_UNORM, GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NO_SWIZZLE },
+  { VIRGL_FORMAT_R10G10B10X2_UNORM, GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, RGB1_SWIZZLE },
   { VIRGL_FORMAT_R10G10B10A2_UNORM, GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, NO_SWIZZLE },
 };
 
@@ -258,7 +259,7 @@ static struct vrend_format_table bptc_formats[] = {
 };
 
 static struct vrend_format_table gles_bgra_formats[] = {
-  { VIRGL_FORMAT_B8G8R8X8_UNORM, GL_BGRA_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_B8G8R8X8_UNORM, GL_BGRA_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE, RGB1_SWIZZLE },
   { VIRGL_FORMAT_B8G8R8A8_UNORM, GL_BGRA_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 };
 
-- 
2.15.1