mesa: add ARB_texture_buffer_range glTextureBufferRangeEXT function

[mesa.git] / src / mesa / main / teximage.c

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 67500830853179392dfb2b5efd22e94294bda43c..bea5c9ae356440091eb0dd15ad8b446a257c86b7 100644 (file)
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -6006,9 +6006,9 @@ _mesa_get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
       case GL_LUMINANCE32UI_EXT:
          return MESA_FORMAT_L_UINT32;
       case GL_LUMINANCE8_ALPHA8:
-         return MESA_FORMAT_L8A8_UNORM;
+         return MESA_FORMAT_LA_UNORM8;
       case GL_LUMINANCE16_ALPHA16:
-         return MESA_FORMAT_L16A16_UNORM;
+         return MESA_FORMAT_LA_UNORM16;
       case GL_LUMINANCE_ALPHA16F_ARB:
          return MESA_FORMAT_LA_FLOAT16;
       case GL_LUMINANCE_ALPHA32F_ARB:
@@ -6089,11 +6089,11 @@ _mesa_get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
       return MESA_FORMAT_RGBA_UINT32;
 
    case GL_RG8:
-      return MESA_FORMAT_R8G8_UNORM;
+      return MESA_FORMAT_RG_UNORM8;
    case GL_RG16:
       if (_mesa_is_gles(ctx) && !_mesa_has_EXT_texture_norm16(ctx))
          return MESA_FORMAT_NONE;
-      return MESA_FORMAT_R16G16_UNORM;
+      return MESA_FORMAT_RG_UNORM16;
    case GL_RG16F:
       return MESA_FORMAT_RG_FLOAT16;
    case GL_RG32F:
@@ -6401,6 +6401,52 @@ _mesa_TexBufferRange(GLenum target, GLenum internalFormat, GLuint buffer,
                         offset, size, "glTexBufferRange");
 }
 
+
+/** GL_ARB_texture_buffer_range + GL_EXT_direct_state_access */
+void GLAPIENTRY
+_mesa_TextureBufferRangeEXT(GLuint texture, GLenum target, GLenum internalFormat,
+                            GLuint buffer, GLintptr offset, GLsizeiptr size)
+{
+   struct gl_texture_object *texObj;
+   struct gl_buffer_object *bufObj;
+
+   GET_CURRENT_CONTEXT(ctx);
+
+   texObj = _mesa_lookup_or_create_texture(ctx, target, texture, false, true,
+                                           "glTextureBufferRangeEXT");
+   if (!texObj)
+      return;
+
+   if (!check_texture_buffer_target(ctx, target, "glTextureBufferRangeEXT"))
+      return;
+
+   if (buffer) {
+      bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, "glTextureBufferRangeEXT");
+      if (!bufObj)
+         return;
+
+      if (!check_texture_buffer_range(ctx, bufObj, offset, size,
+          "glTextureBufferRangeEXT"))
+         return;
+
+   } else {
+      /* OpenGL 4.5 core spec (02.02.2015) says in Section 8.9 Buffer
+       * Textures (PDF page 254):
+       *    "If buffer is zero, then any buffer object attached to the buffer
+       *    texture is detached, the values offset and size are ignored and
+       *    the state for offset and size for the buffer texture are reset to
+       *    zero."
+       */
+      offset = 0;
+      size = 0;
+      bufObj = NULL;
+   }
+
+   texture_buffer_range(ctx, texObj, internalFormat, bufObj,
+                        offset, size, "glTextureBufferRangeEXT");
+}
+
+
 void GLAPIENTRY
 _mesa_TextureBuffer(GLuint texture, GLenum internalFormat, GLuint buffer)
 {