[Mesa-dev] [PATCH 1/2] mesa: Add color renderable/texture filterable format info for ES 3.x.

[Kenneth Graunke]

OpenGL ES 3.x contains a table of sized internal formats and their
required properties.  In particular, each format is marked as
"Color Renderable" or "Texture Filterable".

This patch introduces two functions that can be used to query the
information from that table.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/main/glformats.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 src/mesa/main/glformats.h |  7 ++++
 2 files changed, 90 insertions(+)

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index cf64958..96ab393 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -3556,3 +3556,86 @@ _mesa_format_from_format_and_type(GLenum format, GLenum type)
     */
    unreachable("Unsupported format");
 }
+
+/**
+ * Returns true if \p internal_format is a sized internal format that
+ * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
+ */
+bool
+_mesa_is_es3_color_renderable(GLenum internal_format)
+{
+   switch (internal_format) {
+   case GL_R8:
+   case GL_RG8:
+   case GL_RGB8:
+   case GL_RGB565:
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGBA8:
+   case GL_RGB10_A2:
+   case GL_RGB10_A2UI:
+   case GL_SRGB8_ALPHA8:
+   case GL_R16F:
+   case GL_RG16F:
+   case GL_RGBA16F:
+   case GL_R32F:
+   case GL_RG32F:
+   case GL_RGBA32F:
+   case GL_R11F_G11F_B10F:
+   case GL_R8I:
+   case GL_R8UI:
+   case GL_R16I:
+   case GL_R16UI:
+   case GL_R32I:
+   case GL_R32UI:
+   case GL_RG8I:
+   case GL_RG8UI:
+   case GL_RG16I:
+   case GL_RG16UI:
+   case GL_RG32I:
+   case GL_RG32UI:
+   case GL_RGBA8I:
+   case GL_RGBA8UI:
+   case GL_RGBA16I:
+   case GL_RGBA16UI:
+   case GL_RGBA32I:
+   case GL_RGBA32UI:
+      return true;
+   default:
+      return false;
+   }
+}
+
+/**
+ * Returns true if \p internal_format is a sized internal format that
+ * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
+ */
+bool
+_mesa_is_es3_texture_filterable(GLenum internal_format)
+{
+   switch (internal_format) {
+   case GL_R8:
+   case GL_R8_SNORM:
+   case GL_RG8:
+   case GL_RG8_SNORM:
+   case GL_RGB8:
+   case GL_RGB8_SNORM:
+   case GL_RGB565:
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGBA8:
+   case GL_RGBA8_SNORM:
+   case GL_RGB10_A2:
+   case GL_SRGB8:
+   case GL_SRGB8_ALPHA8:
+   case GL_R16F:
+   case GL_RG16F:
+   case GL_RGB16F:
+   case GL_RGBA16F:
+   case GL_R11F_G11F_B10F:
+   case GL_RGB9_E5:
+      return true;
+   default:
+      return false;
+   }
+}
diff --git a/src/mesa/main/glformats.h b/src/mesa/main/glformats.h
index 00d2767..c73f464 100644
--- a/src/mesa/main/glformats.h
+++ b/src/mesa/main/glformats.h
@@ -28,6 +28,7 @@
 #define GLFORMATS_H
 
 
+#include <stdbool.h>
 #include <GL/gl.h>
 
 
@@ -144,6 +145,12 @@ _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat );
 extern uint32_t
 _mesa_format_from_format_and_type(GLenum format, GLenum type);
 
+extern bool
+_mesa_is_es3_color_renderable(GLenum internal_format);
+
+extern bool
+_mesa_is_es3_texture_filterable(GLenum internal_format);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.7.3