[Mesa-dev] [PATCH 02/27] mesa: Add a new texture format GL_COMPRESSED_RGB8_ETC2

Anuj Phogat anuj.phogat at gmail.com
Fri Oct 19 16:28:37 PDT 2012


Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
---
 src/mesa/main/format_unpack.c |    7 +++++++
 src/mesa/main/formats.c       |   13 +++++++++++++
 src/mesa/main/formats.h       |    1 +
 src/mesa/main/glformats.c     |    3 +++
 src/mesa/main/texcompress.c   |   20 ++++++++++++++++++++
 src/mesa/main/texformat.c     |   10 ++++++++++
 src/mesa/main/teximage.c      |    9 +++++++++
 src/mesa/main/texstore.c      |    1 +
 8 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/format_unpack.c b/src/mesa/main/format_unpack.c
index 7b46dfc..d0029ab 100644
--- a/src/mesa/main/format_unpack.c
+++ b/src/mesa/main/format_unpack.c
@@ -1337,6 +1337,12 @@ unpack_ETC1_RGB8(const void *src, GLfloat dst[][4], GLuint n)
 }
 
 static void
+unpack_ETC2_RGB8(const void *src, GLfloat dst[][4], GLuint n)
+{
+   /* XXX to do */
+}
+
+static void
 unpack_SIGNED_A8(const void *src, GLfloat dst[][4], GLuint n)
 {
    const GLbyte *s = ((const GLbyte *) src);
@@ -1585,6 +1591,7 @@ get_unpack_rgba_function(gl_format format)
       table[MESA_FORMAT_SIGNED_LA_LATC2] = unpack_SIGNED_LA_LATC2;
 
       table[MESA_FORMAT_ETC1_RGB8] = unpack_ETC1_RGB8;
+      table[MESA_FORMAT_ETC2_RGB8] = unpack_ETC2_RGB8;
 
       table[MESA_FORMAT_SIGNED_A8] = unpack_SIGNED_A8;
       table[MESA_FORMAT_SIGNED_L8] = unpack_SIGNED_L8;
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 1fa641c..f9c9fd8 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -1398,6 +1398,16 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
       4, 4, 8                     /* 8 bytes per 4x4 block */
    },
 
+   {
+      MESA_FORMAT_ETC2_RGB8,
+      "MESA_FORMAT_ETC2_RGB8",
+      GL_RGB,
+      GL_UNSIGNED_NORMALIZED,
+      8, 8, 8, 0,
+      0, 0, 0, 0, 0,
+      4, 4, 8                     /* 8 bytes per 4x4 block */
+   },
+
    /* Signed formats from EXT_texture_snorm that are not in GL3.1 */
    {
       MESA_FORMAT_SIGNED_A8,
@@ -1840,6 +1850,7 @@ _mesa_get_uncompressed_format(gl_format format)
    case MESA_FORMAT_SIGNED_LA_LATC2:
       return MESA_FORMAT_SIGNED_AL88;
    case MESA_FORMAT_ETC1_RGB8:
+   case MESA_FORMAT_ETC2_RGB8:
       return MESA_FORMAT_RGB888;
    default:
 #ifdef DEBUG
@@ -2290,6 +2301,7 @@ _mesa_format_to_type_and_comps(gl_format format,
    case MESA_FORMAT_LA_LATC2:
    case MESA_FORMAT_SIGNED_LA_LATC2:
    case MESA_FORMAT_ETC1_RGB8:
+   case MESA_FORMAT_ETC2_RGB8:
       /* XXX generate error instead? */
       *datatype = GL_UNSIGNED_BYTE;
       *comps = 0;
@@ -2920,6 +2932,7 @@ _mesa_format_matches_format_and_type(gl_format gl_format,
       return GL_FALSE;
 
    case MESA_FORMAT_ETC1_RGB8:
+   case MESA_FORMAT_ETC2_RGB8:
       return GL_FALSE;
 
    case MESA_FORMAT_SIGNED_A8:
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index 1843eb6..1d3cc35 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -259,6 +259,7 @@ typedef enum
    /*@}*/
 
    MESA_FORMAT_ETC1_RGB8,
+   MESA_FORMAT_ETC2_RGB8,
 
    MESA_FORMAT_SIGNED_A8,         /*                               AAAA AAAA */
    MESA_FORMAT_SIGNED_L8,         /*                               LLLL LLLL */
diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index 2d06cb7..522d2ac 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -572,6 +572,7 @@ _mesa_is_color_format(GLenum format)
       case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
       case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
       case GL_ETC1_RGB8_OES:
+      case GL_COMPRESSED_RGB8_ETC2:
       /* generic integer formats */
       case GL_RED_INTEGER_EXT:
       case GL_GREEN_INTEGER_EXT:
@@ -829,6 +830,8 @@ _mesa_is_compressed_format(struct gl_context *ctx, GLenum format)
    case GL_ETC1_RGB8_OES:
       return _mesa_is_gles(ctx)
          && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
+   case GL_COMPRESSED_RGB8_ETC2:
+      return _mesa_is_gles3(ctx);
 #if FEATURE_ES
    case GL_PALETTE4_RGB8_OES:
    case GL_PALETTE4_RGBA8_OES:
diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c
index 846d4bb..1d38066 100644
--- a/src/mesa/main/texcompress.c
+++ b/src/mesa/main/texcompress.c
@@ -33,6 +33,7 @@
 #include "glheader.h"
 #include "imports.h"
 #include "colormac.h"
+#include "context.h"
 #include "formats.h"
 #include "mfeatures.h"
 #include "mtypes.h"
@@ -92,6 +93,7 @@ _mesa_gl_compressed_format_base_format(GLenum format)
    case GL_COMPRESSED_RGB_FXT1_3DFX:
    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
    case GL_ETC1_RGB8_OES:
+   case GL_COMPRESSED_RGB8_ETC2:
       return GL_RGB;
 
    case GL_COMPRESSED_RGBA:
@@ -275,6 +277,15 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats)
       }
    }
 
+   if (_mesa_is_gles3(ctx)) {
+      if (formats) {
+         formats[n++] = GL_COMPRESSED_RGB8_ETC2;
+      }
+      else {
+         n += 1;
+      }
+   }
+
 #if FEATURE_ES1
    if (ctx->API == API_OPENGLES) {
       if (formats) {
@@ -354,6 +365,8 @@ _mesa_glenum_to_compressed_format(GLenum format)
 
    case GL_ETC1_RGB8_OES:
       return MESA_FORMAT_ETC1_RGB8;
+   case GL_COMPRESSED_RGB8_ETC2:
+      return MESA_FORMAT_ETC2_RGB8;
 
    default:
       return MESA_FORMAT_NONE;
@@ -422,6 +435,8 @@ _mesa_compressed_format_to_glenum(struct gl_context *ctx, gl_format mesaFormat)
 
    case MESA_FORMAT_ETC1_RGB8:
       return GL_ETC1_RGB8_OES;
+   case MESA_FORMAT_ETC2_RGB8:
+      return GL_COMPRESSED_RGB8_ETC2;
 
    default:
       _mesa_problem(ctx, "Unexpected mesa texture format in"
@@ -547,6 +562,11 @@ _mesa_decompress_image(gl_format format, GLuint width, GLuint height,
       fetch = _mesa_fetch_texel_2d_f_etc1_rgb8;
       break;
 
+   /* ETC2 formats */
+   case MESA_FORMAT_ETC2_RGB8:
+      fetch = _mesa_fetch_texel_2d_f_etc2_rgb8;
+      break;
+
    default:
       _mesa_problem(NULL, "Unexpected format in _mesa_decompress_image()");
       return;
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index 1a318ab..162f027 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -978,6 +978,16 @@ _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
       }
    }
 
+   if (_mesa_is_gles3(ctx)) {
+      switch (internalFormat) {
+         case GL_COMPRESSED_RGB8_ETC2:
+            RETURN_IF_SUPPORTED(MESA_FORMAT_ETC2_RGB8);
+            break;
+         default:
+            ; /* fallthrough */
+      }
+   }
+
    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
                  _mesa_lookup_enum_by_nr(internalFormat));
    return MESA_FORMAT_NONE;
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 02bd87a..1f6fa89 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -525,6 +525,15 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
       }
    }
 
+   if (_mesa_is_gles3(ctx)) {
+      switch (internalFormat) {
+      case GL_COMPRESSED_RGB8_ETC2:
+         return GL_RGB;
+      default:
+         ; /* fallthrough */
+      }
+   }
+
    if (ctx->API == API_OPENGLES) {
       switch (internalFormat) {
       case GL_PALETTE4_RGB8_OES:
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index 2d05580..88b25b5 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -4138,6 +4138,7 @@ _mesa_get_texstore_func(gl_format format)
       table[MESA_FORMAT_LA_LATC2] = _mesa_texstore_rg_rgtc2;
       table[MESA_FORMAT_SIGNED_LA_LATC2] = _mesa_texstore_signed_rg_rgtc2;
       table[MESA_FORMAT_ETC1_RGB8] = _mesa_texstore_etc1_rgb8;
+      table[MESA_FORMAT_ETC2_RGB8] = _mesa_texstore_etc2_rgb8;
       table[MESA_FORMAT_SIGNED_A8] = _mesa_texstore_snorm8;
       table[MESA_FORMAT_SIGNED_L8] = _mesa_texstore_snorm8;
       table[MESA_FORMAT_SIGNED_AL88] = _mesa_texstore_snorm88;
-- 
1.7.7.6



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