mesa: Expose GL_OES_required_internalformat on GLES contexts.

This extension is effectively a backport of GLES3's internalformat
handling to GLES 1/2.  It guarantees that sized internalformats specified
for textures and renderbuffers have at least the specified size stored.
That's a pretty minimal requirement, so I think it can be dummy_true and
exposed as a standard in Mesa.

As a side effect, it also allows GL_RGB565 to be specified as a texture
format, not just as a renderbuffer.  Mesa had previously been allowing 565
textures, which angered DEQP in the absence of this extension being
exposed.

v2: Allow 2101010rev with sized internalformats even on GLES3, citing the
    extension spec.  Extend extension checks for GLES2 contexts exposing
    with texture_float, texture_half_float, and texture_rg.
v3: Fix ALPHA/LUMINANCE/LUMINANCE_ALPHA error checking (GLES3 CTS
    failures)
v4: Mark GL_RGB10 non-color-renderable on ES, fix A/L/LA errors on GLES2
    with float formats.

Reviewed-by: Nicolai Hähnle <[email protected]>

1 files changed, 63 insertions, 16 deletions

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index aec41f07993..7b4b405a814 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -2779,7 +2779,7 @@ _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
 
 /**
  * Do error checking of format/type combinations for OpenGL ES 3
- * glTex[Sub]Image.
+ * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
  * \return error code, or GL_NO_ERROR.
  */
 GLenum
@@ -2842,7 +2842,10 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          case GL_RGBA8:
          case GL_RGB5_A1:
          case GL_RGBA4:
+            break;
          case GL_SRGB8_ALPHA8_EXT:
+            if (ctx->Version <= 20)
+               return GL_INVALID_OPERATION;
             break;
          default:
             return GL_INVALID_OPERATION;
@@ -2850,7 +2853,7 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_BYTE:
-         if (internalFormat != GL_RGBA8_SNORM)
+         if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
             return GL_INVALID_OPERATION;
          break;
 
@@ -2876,9 +2879,11 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
 
       case GL_UNSIGNED_INT_2_10_10_10_REV:
          switch (internalFormat) {
-         case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
+         case GL_RGBA:
          case GL_RGB10_A2:
          case GL_RGB5_A1:
+            if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
+               return GL_INVALID_OPERATION;
             break;
          default:
             return GL_INVALID_OPERATION;
@@ -2886,7 +2891,7 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_HALF_FLOAT:
-         if (internalFormat != GL_RGBA16F)
+         if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
             return GL_INVALID_OPERATION;
          break;
 
@@ -2894,6 +2899,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          switch (internalFormat) {
          case GL_RGBA16F:
          case GL_RGBA32F:
+            if (ctx->Version <= 20)
+               return GL_INVALID_OPERATION;
             break;
          case GL_RGBA:
             if (ctx->Extensions.OES_texture_float && internalFormat == format)
@@ -2912,6 +2919,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RGBA_INTEGER:
+      if (ctx->Version <= 20)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_RGBA8UI)
@@ -2960,7 +2969,10 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          case GL_RGB:
          case GL_RGB8:
          case GL_RGB565:
+            break;
          case GL_SRGB8:
+            if (ctx->Version <= 20)
+               return GL_INVALID_OPERATION;
             break;
          default:
             return GL_INVALID_OPERATION;
@@ -2968,7 +2980,7 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_BYTE:
-         if (internalFormat != GL_RGB8_SNORM)
+         if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
             return GL_INVALID_OPERATION;
          break;
 
@@ -2983,16 +2995,18 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_UNSIGNED_INT_10F_11F_11F_REV:
-         if (internalFormat != GL_R11F_G11F_B10F)
+         if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
             return GL_INVALID_OPERATION;
          break;
 
       case GL_UNSIGNED_INT_5_9_9_9_REV:
-         if (internalFormat != GL_RGB9_E5)
+         if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
             return GL_INVALID_OPERATION;
          break;
 
       case GL_HALF_FLOAT:
+         if (ctx->Version <= 20)
+            return GL_INVALID_OPERATION;
          switch (internalFormat) {
          case GL_RGB16F:
          case GL_R11F_G11F_B10F:
@@ -3009,6 +3023,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          case GL_RGB32F:
          case GL_R11F_G11F_B10F:
          case GL_RGB9_E5:
+            if (ctx->Version <= 20)
+               return GL_INVALID_OPERATION;
             break;
          case GL_RGB:
             if (ctx->Extensions.OES_texture_float && internalFormat == format)
@@ -3025,7 +3041,16 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
 
       case GL_UNSIGNED_INT_2_10_10_10_REV:
          switch (internalFormat) {
-         case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
+         case GL_RGB:
+         case GL_RGB10:
+         case GL_RGB8:
+         case GL_RGB565:
+            /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
+             * GLES3 doesn't, and GL_OES_required_internalformat extends that
+             * to allow the sized RGB internalformats as well.
+             */
+            if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
+               return GL_INVALID_OPERATION;
             break;
          default:
             return GL_INVALID_OPERATION;
@@ -3038,6 +3063,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RGB_INTEGER:
+      if (ctx->Version <= 20)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_RGB8UI)
@@ -3075,6 +3102,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RG:
+      if (!ctx->Extensions.ARB_texture_rg)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_RG8)
@@ -3122,6 +3151,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RG_INTEGER:
+      if (ctx->Version <= 20)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_RG8UI)
@@ -3159,6 +3190,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RED:
+      if (!ctx->Extensions.ARB_texture_rg)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_R8)
@@ -3207,6 +3240,8 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
       break;
 
    case GL_RED_INTEGER:
+      if (ctx->Version <= 20)
+         return GL_INVALID_OPERATION;
       switch (type) {
       case GL_UNSIGNED_BYTE:
          if (internalFormat != GL_R8UI)
@@ -3263,7 +3298,7 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_FLOAT:
-         if (internalFormat != GL_DEPTH_COMPONENT32F)
+         if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
             return GL_INVALID_OPERATION;
          break;
 
@@ -3281,7 +3316,7 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
          break;
 
       case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
-         if (internalFormat != GL_DEPTH32F_STENCIL8)
+         if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
             return GL_INVALID_OPERATION;
          break;
 
@@ -3303,15 +3338,27 @@ _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
    case GL_LUMINANCE_ALPHA:
       switch (type) {
       case GL_FLOAT:
-         if (ctx->Extensions.OES_texture_float && internalFormat == format)
-            break;
+         if (!ctx->Extensions.OES_texture_float || internalFormat != format)
+            return GL_INVALID_OPERATION;
+         break;
       case GL_HALF_FLOAT_OES:
-         if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
-            break;
-      default:
-         if (type != GL_UNSIGNED_BYTE || format != internalFormat)
+         if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
             return GL_INVALID_OPERATION;
+         break;
+      case GL_UNSIGNED_BYTE:
+         if (!(format == internalFormat ||
+               (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
+               (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
+               (format == GL_LUMINANCE_ALPHA &&
+                ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
+                 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
+            return GL_INVALID_OPERATION;
+         }
+         break;
+      default:
+         return GL_INVALID_OPERATION;
       }
+      break;
    }
 
    return GL_NO_ERROR;