ARB_texture_rg: Add R8, R16, RG88, and RG1616 internal formats

1 files changed, 144 insertions, 0 deletions

diff --git a/src/mesa/main/texfetch_tmp.h b/src/mesa/main/texfetch_tmp.h
index f943554370f..2f583ed5223 100644
--- a/src/mesa/main/texfetch_tmp.h
+++ b/src/mesa/main/texfetch_tmp.h
@@ -810,6 +810,54 @@ static void store_texel_argb1555_rev(struct gl_texture_image *texImage,
 #endif
 
 
+/* MESA_FORMAT_RG88 **********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88 texture, return 4 GLchans */
+static void FETCH(f_rg88)( const struct gl_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( s & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( s >> 8 );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_rg88(struct gl_texture_image *texImage,
+                             GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_88(rgba[RCOMP], rgba[GCOMP]);
+}
+#endif
+
+
+/* MESA_FORMAT_RG88_REV ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88_rev texture, return 4 GLchans */
+static void FETCH(f_rg88_rev)( const struct gl_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( s & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( s >> 8 );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_rg88_rev(struct gl_texture_image *texImage,
+                             GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_88(rgba[GCOMP], rgba[RCOMP]);
+}
+#endif
+
+
 /* MESA_FORMAT_AL88 **********************************************************/
 
 /* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLchans */
@@ -834,6 +882,54 @@ static void store_texel_al88(struct gl_texture_image *texImage,
 #endif
 
 
+/* MESA_FORMAT_R8 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88 texture, return 4 GLchans */
+static void FETCH(f_r8)(const struct gl_texture_image *texImage,
+			GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLubyte s = *TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT(s);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_r8(struct gl_texture_image *texImage,
+			   GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   *dst = rgba[RCOMP];
+}
+#endif
+
+
+/* MESA_FORMAT_R16 ***********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D r16 texture, return 4 GLchans */
+static void FETCH(f_r16)(const struct gl_texture_image *texImage,
+			GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT(s);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_r16(struct gl_texture_image *texImage,
+			    GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLushort *rgba = (const GLushort *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = rgba[RCOMP];
+}
+#endif
+
+
 /* MESA_FORMAT_AL88_REV ******************************************************/
 
 /* Fetch texel from 1D, 2D or 3D al88_rev texture, return 4 GLchans */
@@ -858,6 +954,54 @@ static void store_texel_al88_rev(struct gl_texture_image *texImage,
 #endif
 
 
+/* MESA_FORMAT_RG1616 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg1616 texture, return 4 GLchans */
+static void FETCH(f_rg1616)( const struct gl_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT( s & 0xffff );
+   texel[GCOMP] = USHORT_TO_FLOAT( s >> 16 );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_rg1616(struct gl_texture_image *texImage,
+                             GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_1616(rgba[RCOMP], rgba[GCOMP]);
+}
+#endif
+
+
+/* MESA_FORMAT_RG1616_REV ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg1616_rev texture, return 4 GLchans */
+static void FETCH(f_rg1616_rev)( const struct gl_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT( s >> 16 );
+   texel[GCOMP] = USHORT_TO_FLOAT( s & 0xffff );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+#if DIM == 3
+static void store_texel_rg1616_rev(struct gl_texture_image *texImage,
+                             GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_1616(rgba[GCOMP], rgba[RCOMP]);
+}
+#endif
+
+
 /* MESA_FORMAT_AL1616 ********************************************************/
 
 /* Fetch texel from 1D, 2D or 3D al1616 texture, return 4 GLchans */