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Diffstat (limited to 'mesalib/src/mesa/main/texcompress_rgtc.c')
-rw-r--r--mesalib/src/mesa/main/texcompress_rgtc.c89
1 files changed, 18 insertions, 71 deletions
diff --git a/mesalib/src/mesa/main/texcompress_rgtc.c b/mesalib/src/mesa/main/texcompress_rgtc.c
index 2f3a0f214..26dca2d76 100644
--- a/mesalib/src/mesa/main/texcompress_rgtc.c
+++ b/mesalib/src/mesa/main/texcompress_rgtc.c
@@ -51,6 +51,12 @@ static void unsigned_encode_rgtc_chan(GLubyte *blkaddr, GLubyte srccolors[4][4],
static void signed_encode_rgtc_chan(GLbyte *blkaddr, GLbyte srccolors[4][4],
GLint numxpixels, GLint numypixels);
+static void unsigned_fetch_texel_rgtc(unsigned srcRowStride, const GLubyte *pixdata,
+ unsigned i, unsigned j, GLubyte *value, unsigned comps);
+
+static void signed_fetch_texel_rgtc(unsigned srcRowStride, const GLbyte *pixdata,
+ unsigned i, unsigned j, GLbyte *value, unsigned comps);
+
static void extractsrc_u( GLubyte srcpixels[4][4], const GLchan *srcaddr,
GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
{
@@ -312,73 +318,14 @@ _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
return GL_TRUE;
}
-static void _fetch_texel_rgtc_u(GLint srcRowStride, const GLubyte *pixdata,
- GLint i, GLint j, GLchan *value, int comps)
-{
- GLchan decode;
- const GLubyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps);
- const GLubyte alpha0 = blksrc[0];
- const GLubyte alpha1 = blksrc[1];
- const GLubyte bit_pos = ((j&3) * 4 + (i&3)) * 3;
- const GLubyte acodelow = blksrc[2 + bit_pos / 8];
- const GLubyte acodehigh = blksrc[3 + bit_pos / 8];
- const GLubyte code = (acodelow >> (bit_pos & 0x7) |
- (acodehigh << (8 - (bit_pos & 0x7)))) & 0x7;
-
- if (code == 0)
- decode = UBYTE_TO_CHAN( alpha0 );
- else if (code == 1)
- decode = UBYTE_TO_CHAN( alpha1 );
- else if (alpha0 > alpha1)
- decode = UBYTE_TO_CHAN( ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7) );
- else if (code < 6)
- decode = UBYTE_TO_CHAN( ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5) );
- else if (code == 6)
- decode = 0;
- else
- decode = CHAN_MAX;
-
- *value = decode;
-}
-
-
-static void _fetch_texel_rgtc_s(GLint srcRowStride, const GLbyte *pixdata,
- GLint i, GLint j, GLbyte *value, int comps)
-{
- GLbyte decode;
- const GLbyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps);
- const GLbyte alpha0 = blksrc[0];
- const GLbyte alpha1 = blksrc[1];
- const GLbyte bit_pos = ((j&3) * 4 + (i&3)) * 3;
- const GLbyte acodelow = blksrc[2 + bit_pos / 8];
- const GLbyte acodehigh = blksrc[3 + bit_pos / 8];
- const GLbyte code = (acodelow >> (bit_pos & 0x7) |
- (acodehigh << (8 - (bit_pos & 0x7)))) & 0x7;
-
- if (code == 0)
- decode = alpha0;
- else if (code == 1)
- decode = alpha1;
- else if (alpha0 > alpha1)
- decode = ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7);
- else if (code < 6)
- decode = ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5);
- else if (code == 6)
- decode = -128;
- else
- decode = 127;
-
- *value = decode;
-}
-
void
_mesa_fetch_texel_2d_f_red_rgtc1(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
- GLchan red;
- _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data),
+ GLubyte red;
+ unsigned_fetch_texel_rgtc(texImage->RowStride, (GLubyte *)(texImage->Data),
i, j, &red, 1);
- texel[RCOMP] = CHAN_TO_FLOAT(red);
+ texel[RCOMP] = UBYTE_TO_FLOAT(red);
texel[GCOMP] = 0.0;
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
@@ -389,7 +336,7 @@ _mesa_fetch_texel_2d_f_signed_red_rgtc1(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
GLbyte red;
- _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data),
+ signed_fetch_texel_rgtc(texImage->RowStride, (GLbyte *)(texImage->Data),
i, j, &red, 1);
texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
texel[GCOMP] = 0.0;
@@ -401,13 +348,13 @@ void
_mesa_fetch_texel_2d_f_rg_rgtc2(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
- GLchan red, green;
- _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data),
+ GLubyte red, green;
+ unsigned_fetch_texel_rgtc(texImage->RowStride, (GLubyte *)(texImage->Data),
i, j, &red, 2);
- _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data) + 8,
+ unsigned_fetch_texel_rgtc(texImage->RowStride, (GLubyte *)(texImage->Data) + 8,
i, j, &green, 2);
- texel[RCOMP] = CHAN_TO_FLOAT(red);
- texel[GCOMP] = CHAN_TO_FLOAT(green);
+ texel[RCOMP] = UBYTE_TO_FLOAT(red);
+ texel[GCOMP] = UBYTE_TO_FLOAT(green);
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
}
@@ -417,9 +364,9 @@ _mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
GLbyte red, green;
- _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data),
+ signed_fetch_texel_rgtc(texImage->RowStride, (GLbyte *)(texImage->Data),
i, j, &red, 2);
- _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data) + 8,
+ signed_fetch_texel_rgtc(texImage->RowStride, (GLbyte *)(texImage->Data) + 8,
i, j, &green, 2);
texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
texel[GCOMP] = BYTE_TO_FLOAT_TEX(green);
@@ -442,7 +389,7 @@ _mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage,
#define TAG(x) signed_##x
#define TYPE GLbyte
-#define T_MIN (GLbyte)-127
+#define T_MIN (GLbyte)-128
#define T_MAX (GLbyte)127
#include "texcompress_rgtc_tmp.h"
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 04:21:47 +0000