Mesa (master): mesa: implement new texture format AL44
Marek Olšák
mareko at kemper.freedesktop.org
Thu Dec 23 15:58:46 UTC 2010
Module: Mesa
Branch: master
Commit: bae9d511f343c7bd5eb66d1d1d18d32b47e738e3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=bae9d511f343c7bd5eb66d1d1d18d32b47e738e3
Author: Marek Olšák <maraeo at gmail.com>
Date: Tue Dec 21 23:46:32 2010 +0100
mesa: implement new texture format AL44
Radeon GPUs can do this. R600 can even do render-to-texture.
Packing and extracting aren't implemented, but we shouldn't hit them (I think).
Tested with swrast, softpipe, and r300g.
---
src/mesa/main/colormac.h | 3 ++
src/mesa/main/formats.c | 10 +++++++++
src/mesa/main/formats.h | 1 +
src/mesa/main/texfetch.c | 7 ++++++
src/mesa/main/texfetch_tmp.h | 24 +++++++++++++++++++++
src/mesa/main/texformat.c | 4 ++-
src/mesa/main/texstore.c | 47 ++++++++++++++++++++++++++++++++++++++++++
7 files changed, 95 insertions(+), 1 deletions(-)
diff --git a/src/mesa/main/colormac.h b/src/mesa/main/colormac.h
index f00faa5..065f9f9 100644
--- a/src/mesa/main/colormac.h
+++ b/src/mesa/main/colormac.h
@@ -208,6 +208,9 @@ do { \
#define PACK_COLOR_4444_REV( R, G, B, A ) \
((((B) & 0xf0) << 8) | (((A) & 0xf0) << 4) | ((R) & 0xf0) | ((G) >> 4))
+#define PACK_COLOR_44( L, A ) \
+ (((L) & 0xf0) | (((A) & 0xf0) >> 4))
+
#define PACK_COLOR_88( L, A ) \
(((L) << 8) | (A))
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 0975407..90296f4 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -222,6 +222,15 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
+ MESA_FORMAT_AL44, /* Name */
+ "MESA_FORMAT_AL44", /* StrName */
+ GL_LUMINANCE_ALPHA, /* BaseFormat */
+ GL_UNSIGNED_NORMALIZED, /* DataType */
+ 0, 0, 0, 4, /* Red/Green/Blue/AlphaBits */
+ 4, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
+ 1, 1, 1 /* BlockWidth/Height,Bytes */
+ },
+ {
MESA_FORMAT_AL88, /* Name */
"MESA_FORMAT_AL88", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
@@ -1270,6 +1279,7 @@ _mesa_format_to_type_and_comps(gl_format format,
*comps = 4;
return;
+ case MESA_FORMAT_AL44: /* XXX this isn't plain GL_UNSIGNED_BYTE */
case MESA_FORMAT_AL88:
case MESA_FORMAT_AL88_REV:
case MESA_FORMAT_RG88:
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index c147376..db63fde 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -65,6 +65,7 @@ typedef enum
MESA_FORMAT_RGBA5551, /* RRRR RGGG GGBB BBBA */
MESA_FORMAT_ARGB1555, /* ARRR RRGG GGGB BBBB */
MESA_FORMAT_ARGB1555_REV, /* GGGB BBBB ARRR RRGG */
+ MESA_FORMAT_AL44, /* AAAA LLLL */
MESA_FORMAT_AL88, /* AAAA AAAA LLLL LLLL */
MESA_FORMAT_AL88_REV, /* LLLL LLLL AAAA AAAA */
MESA_FORMAT_AL1616, /* AAAA AAAA AAAA AAAA LLLL LLLL LLLL LLLL */
diff --git a/src/mesa/main/texfetch.c b/src/mesa/main/texfetch.c
index dff5963..5c7e728 100644
--- a/src/mesa/main/texfetch.c
+++ b/src/mesa/main/texfetch.c
@@ -237,6 +237,13 @@ texfetch_funcs[MESA_FORMAT_COUNT] =
store_texel_argb1555_rev
},
{
+ MESA_FORMAT_AL44,
+ fetch_texel_1d_f_al44,
+ fetch_texel_2d_f_al44,
+ fetch_texel_3d_f_al44,
+ store_texel_al44
+ },
+ {
MESA_FORMAT_AL88,
fetch_texel_1d_f_al88,
fetch_texel_2d_f_al88,
diff --git a/src/mesa/main/texfetch_tmp.h b/src/mesa/main/texfetch_tmp.h
index c985de9..b6ffdd0 100644
--- a/src/mesa/main/texfetch_tmp.h
+++ b/src/mesa/main/texfetch_tmp.h
@@ -883,6 +883,30 @@ static void store_texel_rg88_rev(struct gl_texture_image *texImage,
#endif
+/* MESA_FORMAT_AL44 **********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al44 texture, return 4 GLchans */
+static void FETCH(f_al44)( 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] =
+ texel[GCOMP] =
+ texel[BCOMP] = UBYTE_TO_FLOAT( (s & 0x0f) << 4 );
+ texel[ACOMP] = UBYTE_TO_FLOAT( s & 0xf0 );
+}
+
+#if DIM == 3
+static void store_texel_al44(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 = PACK_COLOR_44(rgba[ACOMP], rgba[RCOMP]);
+}
+#endif
+
+
/* MESA_FORMAT_AL88 **********************************************************/
/* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLchans */
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index 9d30a7e..fb738fc 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -117,9 +117,11 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
return MESA_FORMAT_L8;
/* Luminance/Alpha formats */
+ case GL_LUMINANCE4_ALPHA4:
+ return MESA_FORMAT_AL44;
+
case 2:
case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
return MESA_FORMAT_AL88;
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index b14ffe8..f9ab946 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -2113,6 +2113,52 @@ _mesa_texstore_argb2101010(TEXSTORE_PARAMS)
/**
+ * Do texstore for 2-channel, 4-bit/channel, unsigned normalized formats.
+ */
+static GLboolean
+_mesa_texstore_unorm44(TEXSTORE_PARAMS)
+{
+ const GLuint texelBytes = _mesa_get_format_bytes(dstFormat);
+ const GLenum baseFormat = _mesa_get_format_base_format(dstFormat);
+
+ ASSERT(dstFormat == MESA_FORMAT_AL44);
+ ASSERT(texelBytes == 1);
+
+ {
+ /* general path */
+ const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
+ baseInternalFormat,
+ baseFormat,
+ srcWidth, srcHeight, srcDepth,
+ srcFormat, srcType, srcAddr,
+ srcPacking);
+ const GLchan *src = tempImage;
+ GLint img, row, col;
+ if (!tempImage)
+ return GL_FALSE;
+ for (img = 0; img < srcDepth; img++) {
+ GLubyte *dstRow = (GLubyte *) dstAddr
+ + dstImageOffsets[dstZoffset + img] * texelBytes
+ + dstYoffset * dstRowStride
+ + dstXoffset * texelBytes;
+ for (row = 0; row < srcHeight; row++) {
+ GLubyte *dstUS = (GLubyte *) dstRow;
+ for (col = 0; col < srcWidth; col++) {
+ /* src[0] is luminance, src[1] is alpha */
+ dstUS[col] = PACK_COLOR_44( CHAN_TO_UBYTE(src[1]),
+ CHAN_TO_UBYTE(src[0]) );
+ src += 2;
+ }
+ dstRow += dstRowStride;
+ }
+ }
+ free((void *) tempImage);
+ }
+ return GL_TRUE;
+}
+
+
+/**
* Do texstore for 2-channel, 8-bit/channel, unsigned normalized formats.
*/
static GLboolean
@@ -3995,6 +4041,7 @@ texstore_funcs[MESA_FORMAT_COUNT] =
{ MESA_FORMAT_RGBA5551, _mesa_texstore_rgba5551 },
{ MESA_FORMAT_ARGB1555, _mesa_texstore_argb1555 },
{ MESA_FORMAT_ARGB1555_REV, _mesa_texstore_argb1555 },
+ { MESA_FORMAT_AL44, _mesa_texstore_unorm44 },
{ MESA_FORMAT_AL88, _mesa_texstore_unorm88 },
{ MESA_FORMAT_AL88_REV, _mesa_texstore_unorm88 },
{ MESA_FORMAT_AL1616, _mesa_texstore_unorm1616 },
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