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mesa: Add decoding functions for GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2

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Data in GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 format is decoded and stored
in MESA_FORMAT_RGBA8888_REV.

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Anuj Phogat
2012-10-22 13:34:30 -07:00
committed by Ian Romanick
parent 75211f4367
commit 883efbf6da
5 changed files with 171 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/main/texcompress.c
+1 -1
View File
@@ -632,7 +632,7 @@ _mesa_decompress_image(gl_format format, GLuint width, GLuint height,
fetch = _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac;
break;
case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
/* fetch = _mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1; -- not implemented yet */
fetch = _mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1;
break;
case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
/* fetch = _mesa_fetch_texel_2d_f_etc2_srgb8_punchthrough_alpha1; -- not implemented yet */
src/mesa/main/texcompress_etc.c
+159 -21
View File
@@ -33,6 +33,7 @@
* GL_COMPRESSED_RG11_EAC
* GL_COMPRESSED_SIGNED_R11_EAC
* GL_COMPRESSED_SIGNED_RG11_EAC
* MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1
*/
#include <stdbool.h>
@@ -49,6 +50,7 @@ struct etc2_block {
uint64_t pixel_indices[2];
const int *modifier_tables[2];
bool flipped;
bool opaque;
bool is_ind_mode;
bool is_diff_mode;
bool is_t_mode;
@@ -83,6 +85,17 @@ static const int etc2_modifier_tables[16][8] = {
{ -3, -5, -7, -9, 2, 4, 6, 8},
};
static const int etc2_modifier_tables_non_opaque[8][4] = {
{ 0, 8, 0, -8},
{ 0, 17, 0, -17},
{ 0, 29, 0, -29},
{ 0, 42, 0, -42},
{ 0, 60, 0, -60},
{ 0, 80, 0, -80},
{ 0, 106, 0, -106},
{ 0, 183, 0, -183}
};
/* define etc1_parse_block and etc. */
#define UINT8_TYPE GLubyte
#define TAG(x) x
@@ -338,10 +351,12 @@ etc2_clamp3(int color)
}
static void
etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src)
etc2_rgb8_parse_block(struct etc2_block *block,
const uint8_t *src,
GLboolean punchthrough_alpha)
{
unsigned i;
GLboolean diffbit = src[3] & 0x2;
GLboolean diffbit = false;
static const int lookup[8] = { 0, 1, 2, 3, -4, -3, -2, -1 };
const int R_plus_dR = (src[0] >> 3) + lookup[src[0] & 0x7];
@@ -355,7 +370,12 @@ etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src)
block->is_h_mode = false;
block->is_planar_mode = false;
if (!diffbit) {
if (punchthrough_alpha)
block->opaque = src[3] & 0x2;
else
diffbit = src[3] & 0x2;
if (!diffbit && !punchthrough_alpha) {
/* individual mode */
block->is_ind_mode = true;
@@ -422,17 +442,21 @@ etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src)
block->distance);
}
}
else if (B_plus_dB < 0 || B_plus_dB > 31){
else if (B_plus_dB < 0 || B_plus_dB > 31) {
/* Planar mode */
block->is_planar_mode = true;
/* opaque bit must be set in planar mode */
if (!block->opaque)
block->opaque = true;
for (i = 0; i < 3; i++) {
block->base_colors[0][i] = etc2_base_color_o_planar(src, i);
block->base_colors[1][i] = etc2_base_color_h_planar(src, i);
block->base_colors[2][i] = etc2_base_color_v_planar(src, i);
}
}
else if (diffbit) {
else if (diffbit || punchthrough_alpha) {
/* differential mode */
block->is_diff_mode = true;
@@ -446,9 +470,19 @@ etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src)
}
if (block->is_ind_mode || block->is_diff_mode) {
/* pick modifier tables. same for etc1 & etc2 textures */
block->modifier_tables[0] = etc1_modifier_tables[(src[3] >> 5) & 0x7];
block->modifier_tables[1] = etc1_modifier_tables[(src[3] >> 2) & 0x7];
int table1_idx = (src[3] >> 5) & 0x7;
int table2_idx = (src[3] >> 2) & 0x7;
/* Use same modifier tables as for etc1 textures if opaque bit is set
* or if non punchthrough texture format
*/
block->modifier_tables[0] = (block->opaque || !punchthrough_alpha) ?
etc1_modifier_tables[table1_idx] :
etc2_modifier_tables_non_opaque[table1_idx];
block->modifier_tables[1] = (block->opaque || !punchthrough_alpha) ?
etc1_modifier_tables[table2_idx] :
etc2_modifier_tables_non_opaque[table2_idx];
block->flipped = (src[3] & 0x1);
}
@@ -458,7 +492,8 @@ etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src)
static void
etc2_rgb8_fetch_texel(const struct etc2_block *block,
int x, int y, uint8_t *dst)
int x, int y, uint8_t *dst,
GLboolean punchthrough_alpha)
{
const uint8_t *base_color;
int modifier, bit, idx, blk;
@@ -469,6 +504,16 @@ etc2_rgb8_fetch_texel(const struct etc2_block *block,
((block->pixel_indices[0] >> (bit)) & 0x1);
if (block->is_ind_mode || block->is_diff_mode) {
/* check for punchthrough_alpha format */
if (punchthrough_alpha) {
if (!block->opaque && idx == 2) {
dst[0] = dst[1] = dst[2] = dst[3] = 0;
return;
}
else
dst[3] = 255;
}
/* Use pixel index and subblock to get the modifier */
blk = (block->flipped) ? (y >= 2) : (x >= 2);
base_color = block->base_colors[blk];
@@ -479,6 +524,16 @@ etc2_rgb8_fetch_texel(const struct etc2_block *block,
dst[2] = etc2_clamp(base_color[2] + modifier);
}
else if (block->is_t_mode || block->is_h_mode) {
/* check for punchthrough_alpha format */
if (punchthrough_alpha) {
if (!block->opaque && idx == 2) {
dst[0] = dst[1] = dst[2] = dst[3] = 0;
return;
}
else
dst[3] = 255;
}
/* Use pixel index to pick one of the paint colors */
dst[0] = block->paint_colors[idx][0];
dst[1] = block->paint_colors[idx][1];
@@ -505,7 +560,11 @@ etc2_rgb8_fetch_texel(const struct etc2_block *block,
dst[0] = etc2_clamp(red);
dst[1] = etc2_clamp(green);
dst[2] = etc2_clamp(blue);
}
/* check for punchthrough_alpha format */
if (punchthrough_alpha)
dst[3] = 255;
}
}
static void
@@ -609,8 +668,8 @@ static void
etc2_rgba8_parse_block(struct etc2_block *block, const uint8_t *src)
{
/* RGB component is parsed the same way as for MESA_FORMAT_ETC2_RGB8 */
etc2_rgb8_parse_block(block, src + 8);
etc2_rgb8_parse_block(block, src + 8,
false /* punchthrough_alpha */);
/* Parse Alpha component */
etc2_alpha8_parse_block(block, src);
}
@@ -619,7 +678,8 @@ static void
etc2_rgba8_fetch_texel(const struct etc2_block *block,
int x, int y, uint8_t *dst)
{
etc2_rgb8_fetch_texel(block, x, y, dst);
etc2_rgb8_fetch_texel(block, x, y, dst,
false /* punchthrough_alpha */);
etc2_alpha8_fetch_texel(block, x, y, dst);
}
@@ -639,12 +699,14 @@ etc2_unpack_rgb8(uint8_t *dst_row,
const uint8_t *src = src_row;
for (x = 0; x < width; x+= bw) {
etc2_rgb8_parse_block(&block, src);
etc2_rgb8_parse_block(&block, src,
false /* punchthrough_alpha */);
for (j = 0; j < bh; j++) {
uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps;
for (i = 0; i < bw; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst);
etc2_rgb8_fetch_texel(&block, i, j, dst,
false /* punchthrough_alpha */);
dst[3] = 255;
dst += comps;
}
@@ -674,12 +736,14 @@ etc2_unpack_srgb8(uint8_t *dst_row,
const uint8_t *src = src_row;
for (x = 0; x < width; x+= bw) {
etc2_rgb8_parse_block(&block, src);
etc2_rgb8_parse_block(&block, src,
false /* punchthrough_alpha */);
for (j = 0; j < bh; j++) {
uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps;
for (i = 0; i < bw; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst);
etc2_rgb8_fetch_texel(&block, i, j, dst,
false /* punchthrough_alpha */);
/* Convert to MESA_FORMAT_SARGB8 */
tmp = dst[0];
dst[0] = dst[2];
@@ -943,6 +1007,40 @@ etc2_unpack_signed_rg11(uint8_t *dst_row,
}
}
static void
etc2_unpack_rgb8_punchthrough_alpha1(uint8_t *dst_row,
unsigned dst_stride,
const uint8_t *src_row,
unsigned src_stride,
unsigned width,
unsigned height)
{
const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
struct etc2_block block;
unsigned x, y, i, j;
for (y = 0; y < height; y += bh) {
const uint8_t *src = src_row;
for (x = 0; x < width; x+= bw) {
etc2_rgb8_parse_block(&block, src,
true /* punchthrough_alpha */);
for (j = 0; j < bh; j++) {
uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps;
for (i = 0; i < bw; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst,
true /* punchthrough_alpha */);
dst += comps;
}
}
src += bs;
}
src_row += src_stride;
}
}
/* ETC2 texture formats are valid in glCompressedTexImage2D and
* glCompressedTexSubImage2D functions */
GLboolean
@@ -1009,6 +1107,14 @@ _mesa_texstore_etc2_signed_rg11_eac(TEXSTORE_PARAMS)
return GL_FALSE;
}
GLboolean
_mesa_texstore_etc2_rgb8_punchthrough_alpha1(TEXSTORE_PARAMS)
{
ASSERT(0);
return GL_FALSE;
}
void
_mesa_fetch_texel_2d_f_etc2_rgb8(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
@@ -1020,8 +1126,10 @@ _mesa_fetch_texel_2d_f_etc2_rgb8(const struct swrast_texture_image *texImage,
src = texImage->Map +
(((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8;
etc2_rgb8_parse_block(&block, src);
etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst);
etc2_rgb8_parse_block(&block, src,
false /* punchthrough_alpha */);
etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst,
false /* punchthrough_alpha */);
texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]);
texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]);
@@ -1040,8 +1148,10 @@ _mesa_fetch_texel_2d_f_etc2_srgb8(const struct swrast_texture_image *texImage,
src = texImage->Map +
(((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8;
etc2_rgb8_parse_block(&block, src);
etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst);
etc2_rgb8_parse_block(&block, src,
false /* punchthrough_alpha */);
etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst,
false /* punchthrough_alpha */);
texel[RCOMP] = _mesa_nonlinear_to_linear(dst[0]);
texel[GCOMP] = _mesa_nonlinear_to_linear(dst[1]);
@@ -1183,6 +1293,29 @@ _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac(const struct swrast_texture_image *t
texel[ACOMP] = 1.0f;
}
void
_mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1(
const struct swrast_texture_image *texImage,
GLint i, GLint j,
GLint k, GLfloat *texel)
{
struct etc2_block block;
uint8_t dst[4];
const uint8_t *src;
src = texImage->Map +
(((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8;
etc2_rgb8_parse_block(&block, src,
true /* punchthrough alpha */);
etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst,
true /* punchthrough alpha */);
texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]);
texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]);
texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]);
texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]);
}
/**
* Decode texture data in any one of following formats:
* `MESA_FORMAT_ETC2_RGB8`
@@ -1193,6 +1326,7 @@ _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac(const struct swrast_texture_image *t
* `MESA_FORMAT_ETC2_RG11_EAC`
* `MESA_FORMAT_ETC2_SIGNED_R11_EAC`
* `MESA_FORMAT_ETC2_SIGNED_RG11_EAC`
* `MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1`
*
* The size of the source data must be a multiple of the ETC2 block size
* even if the texture image's dimensions are not aligned to 4.
@@ -1243,4 +1377,8 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
etc2_unpack_signed_rg11(dst_row, dst_stride,
src_row, src_stride,
src_width, src_height);
else if (format == MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1)
etc2_unpack_rgb8_punchthrough_alpha1(dst_row, dst_stride,
src_row, src_stride,
src_width, src_height);
}
src/mesa/main/texcompress_etc.h
+8
View File
@@ -58,6 +58,9 @@ _mesa_texstore_etc2_signed_r11_eac(TEXSTORE_PARAMS);
GLboolean
_mesa_texstore_etc2_signed_rg11_eac(TEXSTORE_PARAMS);
GLboolean
_mesa_texstore_etc2_rgb8_punchthrough_alpha1(TEXSTORE_PARAMS);
void
_mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel);
@@ -93,6 +96,11 @@ _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac(const struct
GLint i, GLint j,
GLint k, GLfloat *texel);
void
_mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1(
const struct swrast_texture_image *texImage,
GLint i, GLint j,
GLint k, GLfloat *texel);
void
_mesa_etc1_unpack_rgba8888(uint8_t *dst_row,
unsigned dst_stride,
const uint8_t *src_row,
src/mesa/main/texstore.c
+2 -2
View File
@@ -4132,8 +4132,8 @@ _mesa_get_texstore_func(gl_format format)
table[MESA_FORMAT_ETC2_RG11_EAC] = _mesa_texstore_etc2_rg11_eac;
table[MESA_FORMAT_ETC2_SIGNED_R11_EAC] = _mesa_texstore_etc2_signed_r11_eac;
table[MESA_FORMAT_ETC2_SIGNED_RG11_EAC] = _mesa_texstore_etc2_signed_rg11_eac;
/* table[MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1] =
_mesa_texstore_etc2_rgb8_punchthrough_alpha1; -- not implemented yet */
table[MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1] =
_mesa_texstore_etc2_rgb8_punchthrough_alpha1;
/* table[MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1] =
_mesa_texstore_etc2_srgb8_punchthrough_alpha1; -- not implemented yet */
table[MESA_FORMAT_SIGNED_A8] = _mesa_texstore_snorm8;
src/mesa/swrast/s_texfetch.c
+1 -1
View File
@@ -1079,7 +1079,7 @@ texfetch_funcs[] =
{
MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
NULL,
NULL /* _mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1 -- not implemented yet */,
_mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1,
NULL
},
{