vrend: Use red with swizzle for luminance formats

Use GL_RED based formats with a swizzle to implement virgl luminance
formats. Since GL_RED is color renderable this patch allows more
operations to be implemented for virgl luminance formats.

Fixes:

dEQP-GLES2.functional.texture.mipmap.2d.generate.l8_fastest
dEQP-GLES2.functional.texture.mipmap.2d.generate.l8_nicest
dEQP-GLES2.functional.texture.mipmap.cube.generate.l8_fastest
dEQP-GLES2.functional.texture.mipmap.cube.generate.l8_nicest
dEQP-GLES2.functional.texture.specification.basic_copyteximage2d.2d_luminance
dEQP-GLES2.functional.texture.specification.basic_copyteximage2d.cube_luminance
dEQP-GLES2.functional.texture.specification.basic_copytexsubimage2d.2d_luminance
dEQP-GLES2.functional.texture.specification.basic_copytexsubimage2d.cube_luminance

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

src/vrend_formats.c

@@ -29,6 +29,7 @@
 
 #define SWIZZLE_INVALID 0xff
 #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 }
 
 /* fill the format table */
 static struct vrend_format_table base_rgba_formats[] =
@@ -71,10 +72,10 @@ static struct vrend_format_table base_depth_formats[] =
 
 static struct vrend_format_table base_la_formats[] = {
   { VIRGL_FORMAT_A8_UNORM, GL_ALPHA8, GL_ALPHA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
-  { VIRGL_FORMAT_L8_UNORM, GL_LUMINANCE8, GL_LUMINANCE, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_L8_UNORM, GL_R8, GL_RED, GL_UNSIGNED_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_UNORM, GL_LUMINANCE8_ALPHA8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
   { VIRGL_FORMAT_A16_UNORM, GL_ALPHA16, GL_ALPHA, GL_UNSIGNED_SHORT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L16_UNORM, GL_LUMINANCE16, GL_LUMINANCE, GL_UNSIGNED_SHORT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L16_UNORM, GL_R16, GL_RED, GL_UNSIGNED_SHORT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L16A16_UNORM, GL_LUMINANCE16_ALPHA16, GL_LUMINANCE_ALPHA, GL_UNSIGNED_SHORT, NO_SWIZZLE },
 };
 
@@ -112,11 +113,11 @@ static struct vrend_format_table float_base_formats[] = {
 
 static struct vrend_format_table float_la_formats[] = {
   { VIRGL_FORMAT_A16_FLOAT, GL_ALPHA16F_ARB, GL_ALPHA, GL_HALF_FLOAT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L16_FLOAT, GL_LUMINANCE16F_ARB, GL_LUMINANCE, GL_HALF_FLOAT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L16_FLOAT, GL_R16F, GL_RED, GL_HALF_FLOAT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L16A16_FLOAT, GL_LUMINANCE_ALPHA16F_ARB, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, NO_SWIZZLE },
 
   { VIRGL_FORMAT_A32_FLOAT, GL_ALPHA32F_ARB, GL_ALPHA, GL_FLOAT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L32_FLOAT, GL_LUMINANCE32F_ARB, GL_LUMINANCE, GL_FLOAT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L32_FLOAT, GL_R32F, GL_RED, GL_FLOAT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L32A32_FLOAT, GL_LUMINANCE_ALPHA32F_ARB, GL_LUMINANCE_ALPHA, GL_FLOAT, NO_SWIZZLE },
 };
 
@@ -152,26 +153,26 @@ static struct vrend_format_table float_3comp_formats[] = {
 
 static struct vrend_format_table integer_la_formats[] = {
   { VIRGL_FORMAT_A8_UINT, GL_ALPHA8UI_EXT, GL_ALPHA_INTEGER, GL_UNSIGNED_BYTE, NO_SWIZZLE },
-  { VIRGL_FORMAT_L8_UINT, GL_LUMINANCE8UI_EXT, GL_LUMINANCE_INTEGER_EXT, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_L8_UINT, GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_UINT, GL_LUMINANCE_ALPHA8UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_UNSIGNED_BYTE, NO_SWIZZLE },
   { VIRGL_FORMAT_A8_SINT, GL_ALPHA8I_EXT, GL_ALPHA_INTEGER, GL_BYTE, NO_SWIZZLE },
-  { VIRGL_FORMAT_L8_SINT, GL_LUMINANCE8I_EXT, GL_LUMINANCE_INTEGER_EXT, GL_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_L8_SINT, GL_R8I, GL_RED_INTEGER, GL_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_SINT, GL_LUMINANCE_ALPHA8I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_BYTE, NO_SWIZZLE },
 
   { VIRGL_FORMAT_A16_UINT, GL_ALPHA16UI_EXT, GL_ALPHA_INTEGER, GL_UNSIGNED_SHORT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L16_UINT, GL_LUMINANCE16UI_EXT, GL_LUMINANCE_INTEGER_EXT, GL_UNSIGNED_SHORT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L16_UINT, GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L16A16_UINT, GL_LUMINANCE_ALPHA16UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_UNSIGNED_SHORT, NO_SWIZZLE },
 
   { VIRGL_FORMAT_A16_SINT, GL_ALPHA16I_EXT, GL_ALPHA_INTEGER, GL_SHORT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L16_SINT, GL_LUMINANCE16I_EXT, GL_LUMINANCE_INTEGER_EXT, GL_SHORT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L16_SINT, GL_R16I, GL_RED_INTEGER, GL_SHORT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L16A16_SINT, GL_LUMINANCE_ALPHA16I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_SHORT, NO_SWIZZLE },
 
   { VIRGL_FORMAT_A32_UINT, GL_ALPHA32UI_EXT, GL_ALPHA_INTEGER, GL_UNSIGNED_INT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L32_UINT, GL_LUMINANCE32UI_EXT, GL_LUMINANCE_INTEGER_EXT, GL_UNSIGNED_INT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L32_UINT, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L32A32_UINT, GL_LUMINANCE_ALPHA32UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_UNSIGNED_INT, NO_SWIZZLE },
 
   { VIRGL_FORMAT_A32_SINT, GL_ALPHA32I_EXT, GL_ALPHA_INTEGER, GL_INT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L32_SINT, GL_LUMINANCE32I_EXT, GL_LUMINANCE_INTEGER_EXT, GL_INT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L32_SINT, GL_R32I, GL_RED_INTEGER, GL_INT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L32A32_SINT, GL_LUMINANCE_ALPHA32I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_INT, NO_SWIZZLE },
 
 
@@ -193,10 +194,10 @@ static struct vrend_format_table snorm_formats[] = {
 
 static struct vrend_format_table snorm_la_formats[] = {
   { VIRGL_FORMAT_A8_SNORM, GL_ALPHA8_SNORM, GL_ALPHA, GL_BYTE, NO_SWIZZLE },
-  { VIRGL_FORMAT_L8_SNORM, GL_LUMINANCE8_SNORM, GL_LUMINANCE, GL_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_L8_SNORM, GL_R8_SNORM, GL_RED, GL_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, GL_LUMINANCE_ALPHA, GL_BYTE, NO_SWIZZLE },
   { VIRGL_FORMAT_A16_SNORM, GL_ALPHA16_SNORM, GL_ALPHA, GL_SHORT, NO_SWIZZLE },
-  { VIRGL_FORMAT_L16_SNORM, GL_LUMINANCE16_SNORM, GL_LUMINANCE, GL_SHORT, NO_SWIZZLE },
+  { VIRGL_FORMAT_L16_SNORM, GL_R16_SNORM, GL_RED, GL_SHORT, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L16A16_SNORM, GL_LUMINANCE16_ALPHA16_SNORM, GL_LUMINANCE_ALPHA, GL_SHORT, NO_SWIZZLE },
 };
 
@@ -228,7 +229,7 @@ static struct vrend_format_table srgb_formats[] = {
   { 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_L8_SRGB, GL_SLUMINANCE8_EXT, GL_LUMINANCE, GL_UNSIGNED_BYTE, NO_SWIZZLE },
+  { VIRGL_FORMAT_L8_SRGB, GL_SR8_EXT, GL_RED, GL_UNSIGNED_BYTE, RRR1_SWIZZLE },
   { VIRGL_FORMAT_L8A8_SRGB, GL_SLUMINANCE8_ALPHA8_EXT, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, NO_SWIZZLE },
 };