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01d7e3d5a25a7cc49b38f5561d00c2ff22c43e93
third_party_mesa3d/src/mesa/main/pixel.c
Michal Krol 01d7e3d5a2 mesa: Enable true refcounting for NullBufferObj. 
This object can be shared with another context, so we cannot just
delete it when the owning context is being destroyed.

Ensuring that buffer objects are properly refcounted guarantees
NullBufferObj is destroyed when all references to it are removed.
2010-02-09 14:52:52 +01:00

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/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file pixel.c
* Pixel transfer functions (glPixelZoom, glPixelMap, glPixelTransfer)
*/
#include "glheader.h"
#include "bufferobj.h"
#include "colormac.h"
#include "context.h"
#include "macros.h"
#include "pixel.h"
#include "mtypes.h"
#include "glapi/dispatch.h"
#if FEATURE_pixel_transfer
/**********************************************************************/
/***** glPixelZoom *****/
/**********************************************************************/
static void GLAPIENTRY
_mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
{
GET_CURRENT_CONTEXT(ctx);
if (ctx->Pixel.ZoomX == xfactor &&
ctx->Pixel.ZoomY == yfactor)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.ZoomX = xfactor;
ctx->Pixel.ZoomY = yfactor;
}
/**********************************************************************/
/***** glPixelMap *****/
/**********************************************************************/
/**
* Return pointer to a pixelmap by name.
*/
static struct gl_pixelmap *
get_pixelmap(GLcontext *ctx, GLenum map)
{
switch (map) {
case GL_PIXEL_MAP_I_TO_I:
return &ctx->PixelMaps.ItoI;
case GL_PIXEL_MAP_S_TO_S:
return &ctx->PixelMaps.StoS;
case GL_PIXEL_MAP_I_TO_R:
return &ctx->PixelMaps.ItoR;
case GL_PIXEL_MAP_I_TO_G:
return &ctx->PixelMaps.ItoG;
case GL_PIXEL_MAP_I_TO_B:
return &ctx->PixelMaps.ItoB;
case GL_PIXEL_MAP_I_TO_A:
return &ctx->PixelMaps.ItoA;
case GL_PIXEL_MAP_R_TO_R:
return &ctx->PixelMaps.RtoR;
case GL_PIXEL_MAP_G_TO_G:
return &ctx->PixelMaps.GtoG;
case GL_PIXEL_MAP_B_TO_B:
return &ctx->PixelMaps.BtoB;
case GL_PIXEL_MAP_A_TO_A:
return &ctx->PixelMaps.AtoA;
default:
return NULL;
}
}
/**
* Helper routine used by the other _mesa_PixelMap() functions.
*/
static void
store_pixelmap(GLcontext *ctx, GLenum map, GLsizei mapsize,
const GLfloat *values)
{
GLint i;
struct gl_pixelmap *pm = get_pixelmap(ctx, map);
if (!pm) {
_mesa_error(ctx, GL_INVALID_ENUM, "glPixelMap(map)");
return;
}
switch (map) {
case GL_PIXEL_MAP_S_TO_S:
/* special case */
ctx->PixelMaps.StoS.Size = mapsize;
for (i = 0; i < mapsize; i++) {
ctx->PixelMaps.StoS.Map[i] = (GLfloat)IROUND(values[i]);
}
break;
case GL_PIXEL_MAP_I_TO_I:
/* special case */
ctx->PixelMaps.ItoI.Size = mapsize;
for (i = 0; i < mapsize; i++) {
ctx->PixelMaps.ItoI.Map[i] = values[i];
}
break;
default:
/* general case */
pm->Size = mapsize;
for (i = 0; i < mapsize; i++) {
GLfloat val = CLAMP(values[i], 0.0F, 1.0F);
pm->Map[i] = val;
pm->Map8[i] = (GLint) (val * 255.0F);
}
}
}
/**
* Convenience wrapper for _mesa_validate_pbo_access() for gl[Get]PixelMap().
*/
static GLboolean
validate_pbo_access(GLcontext *ctx, struct gl_pixelstore_attrib *pack,
GLsizei mapsize, GLenum format, GLenum type,
const GLvoid *ptr)
{
GLboolean ok;
/* Note, need to use DefaultPacking and Unpack's buffer object */
_mesa_reference_buffer_object(ctx,
&ctx->DefaultPacking.BufferObj,
pack->BufferObj);
ok = _mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1,
format, type, ptr);
/* restore */
_mesa_reference_buffer_object(ctx,
&ctx->DefaultPacking.BufferObj,
ctx->Shared->NullBufferObj);
if (!ok) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glPixelMap(invalid PBO access)");
}
return ok;
}
static void GLAPIENTRY
_mesa_PixelMapfv( GLenum map, GLsizei mapsize, const GLfloat *values )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
/* XXX someday, test against ctx->Const.MaxPixelMapTableSize */
if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
return;
}
if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
/* test that mapsize is a power of two */
if (!_mesa_is_pow_two(mapsize)) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
return;
}
}
FLUSH_VERTICES(ctx, _NEW_PIXEL);
if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
GL_INTENSITY, GL_FLOAT, values)) {
return;
}
values = (const GLfloat *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glPixelMapfv(PBO is mapped)");
}
return;
}
store_pixelmap(ctx, map, mapsize, values);
_mesa_unmap_pbo_source(ctx, &ctx->Unpack);
}
static void GLAPIENTRY
_mesa_PixelMapuiv(GLenum map, GLsizei mapsize, const GLuint *values )
{
GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
return;
}
if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
/* test that mapsize is a power of two */
if (!_mesa_is_pow_two(mapsize)) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
return;
}
}
FLUSH_VERTICES(ctx, _NEW_PIXEL);
if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
GL_INTENSITY, GL_UNSIGNED_INT, values)) {
return;
}
values = (const GLuint *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glPixelMapuiv(PBO is mapped)");
}
return;
}
/* convert to floats */
if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
GLint i;
for (i = 0; i < mapsize; i++) {
fvalues[i] = (GLfloat) values[i];
}
}
else {
GLint i;
for (i = 0; i < mapsize; i++) {
fvalues[i] = UINT_TO_FLOAT( values[i] );
}
}
_mesa_unmap_pbo_source(ctx, &ctx->Unpack);
store_pixelmap(ctx, map, mapsize, fvalues);
}
static void GLAPIENTRY
_mesa_PixelMapusv(GLenum map, GLsizei mapsize, const GLushort *values )
{
GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapusv(mapsize)" );
return;
}
if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) {
/* test that mapsize is a power of two */
if (!_mesa_is_pow_two(mapsize)) {
_mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
return;
}
}
FLUSH_VERTICES(ctx, _NEW_PIXEL);
if (!validate_pbo_access(ctx, &ctx->Unpack, mapsize,
GL_INTENSITY, GL_UNSIGNED_SHORT, values)) {
return;
}
values = (const GLushort *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glPixelMapusv(PBO is mapped)");
}
return;
}
/* convert to floats */
if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
GLint i;
for (i = 0; i < mapsize; i++) {
fvalues[i] = (GLfloat) values[i];
}
}
else {
GLint i;
for (i = 0; i < mapsize; i++) {
fvalues[i] = USHORT_TO_FLOAT( values[i] );
}
}
_mesa_unmap_pbo_source(ctx, &ctx->Unpack);
store_pixelmap(ctx, map, mapsize, fvalues);
}
static void GLAPIENTRY
_mesa_GetPixelMapfv( GLenum map, GLfloat *values )
{
GET_CURRENT_CONTEXT(ctx);
GLuint mapsize, i;
const struct gl_pixelmap *pm;
ASSERT_OUTSIDE_BEGIN_END(ctx);
pm = get_pixelmap(ctx, map);
if (!pm) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapfv(map)");
return;
}
mapsize = pm->Size;
if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
GL_INTENSITY, GL_FLOAT, values)) {
return;
}
values = (GLfloat *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetPixelMapfv(PBO is mapped)");
}
return;
}
if (map == GL_PIXEL_MAP_S_TO_S) {
/* special case */
for (i = 0; i < mapsize; i++) {
values[i] = (GLfloat) ctx->PixelMaps.StoS.Map[i];
}
}
else {
MEMCPY(values, pm->Map, mapsize * sizeof(GLfloat));
}
_mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
static void GLAPIENTRY
_mesa_GetPixelMapuiv( GLenum map, GLuint *values )
{
GET_CURRENT_CONTEXT(ctx);
GLint mapsize, i;
const struct gl_pixelmap *pm;
ASSERT_OUTSIDE_BEGIN_END(ctx);
pm = get_pixelmap(ctx, map);
if (!pm) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapuiv(map)");
return;
}
mapsize = pm->Size;
if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
GL_INTENSITY, GL_UNSIGNED_INT, values)) {
return;
}
values = (GLuint *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetPixelMapuiv(PBO is mapped)");
}
return;
}
if (map == GL_PIXEL_MAP_S_TO_S) {
/* special case */
MEMCPY(values, ctx->PixelMaps.StoS.Map, mapsize * sizeof(GLint));
}
else {
for (i = 0; i < mapsize; i++) {
values[i] = FLOAT_TO_UINT( pm->Map[i] );
}
}
_mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
static void GLAPIENTRY
_mesa_GetPixelMapusv( GLenum map, GLushort *values )
{
GET_CURRENT_CONTEXT(ctx);
GLint mapsize, i;
const struct gl_pixelmap *pm;
ASSERT_OUTSIDE_BEGIN_END(ctx);
pm = get_pixelmap(ctx, map);
if (!pm) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapusv(map)");
return;
}
mapsize = pm ? pm->Size : 0;
if (!validate_pbo_access(ctx, &ctx->Pack, mapsize,
GL_INTENSITY, GL_UNSIGNED_SHORT, values)) {
return;
}
values = (GLushort *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values);
if (!values) {
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetPixelMapusv(PBO is mapped)");
}
return;
}
switch (map) {
/* special cases */
case GL_PIXEL_MAP_I_TO_I:
for (i = 0; i < mapsize; i++) {
values[i] = (GLushort) CLAMP(ctx->PixelMaps.ItoI.Map[i], 0.0, 65535.);
}
break;
case GL_PIXEL_MAP_S_TO_S:
for (i = 0; i < mapsize; i++) {
values[i] = (GLushort) CLAMP(ctx->PixelMaps.StoS.Map[i], 0.0, 65535.);
}
break;
default:
for (i = 0; i < mapsize; i++) {
CLAMPED_FLOAT_TO_USHORT(values[i], pm->Map[i] );
}
}
_mesa_unmap_pbo_dest(ctx, &ctx->Pack);
}
/**********************************************************************/
/***** glPixelTransfer *****/
/**********************************************************************/
/*
* Implements glPixelTransfer[fi] whether called immediately or from a
* display list.
*/
static void GLAPIENTRY
_mesa_PixelTransferf( GLenum pname, GLfloat param )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (pname) {
case GL_MAP_COLOR:
if (ctx->Pixel.MapColorFlag == (param ? GL_TRUE : GL_FALSE))
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
break;
case GL_MAP_STENCIL:
if (ctx->Pixel.MapStencilFlag == (param ? GL_TRUE : GL_FALSE))
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
break;
case GL_INDEX_SHIFT:
if (ctx->Pixel.IndexShift == (GLint) param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.IndexShift = (GLint) param;
break;
case GL_INDEX_OFFSET:
if (ctx->Pixel.IndexOffset == (GLint) param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.IndexOffset = (GLint) param;
break;
case GL_RED_SCALE:
if (ctx->Pixel.RedScale == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.RedScale = param;
break;
case GL_RED_BIAS:
if (ctx->Pixel.RedBias == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.RedBias = param;
break;
case GL_GREEN_SCALE:
if (ctx->Pixel.GreenScale == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.GreenScale = param;
break;
case GL_GREEN_BIAS:
if (ctx->Pixel.GreenBias == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.GreenBias = param;
break;
case GL_BLUE_SCALE:
if (ctx->Pixel.BlueScale == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.BlueScale = param;
break;
case GL_BLUE_BIAS:
if (ctx->Pixel.BlueBias == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.BlueBias = param;
break;
case GL_ALPHA_SCALE:
if (ctx->Pixel.AlphaScale == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.AlphaScale = param;
break;
case GL_ALPHA_BIAS:
if (ctx->Pixel.AlphaBias == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.AlphaBias = param;
break;
case GL_DEPTH_SCALE:
if (ctx->Pixel.DepthScale == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.DepthScale = param;
break;
case GL_DEPTH_BIAS:
if (ctx->Pixel.DepthBias == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.DepthBias = param;
break;
case GL_POST_COLOR_MATRIX_RED_SCALE:
if (ctx->Pixel.PostColorMatrixScale[0] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixScale[0] = param;
break;
case GL_POST_COLOR_MATRIX_RED_BIAS:
if (ctx->Pixel.PostColorMatrixBias[0] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixBias[0] = param;
break;
case GL_POST_COLOR_MATRIX_GREEN_SCALE:
if (ctx->Pixel.PostColorMatrixScale[1] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixScale[1] = param;
break;
case GL_POST_COLOR_MATRIX_GREEN_BIAS:
if (ctx->Pixel.PostColorMatrixBias[1] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixBias[1] = param;
break;
case GL_POST_COLOR_MATRIX_BLUE_SCALE:
if (ctx->Pixel.PostColorMatrixScale[2] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixScale[2] = param;
break;
case GL_POST_COLOR_MATRIX_BLUE_BIAS:
if (ctx->Pixel.PostColorMatrixBias[2] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixBias[2] = param;
break;
case GL_POST_COLOR_MATRIX_ALPHA_SCALE:
if (ctx->Pixel.PostColorMatrixScale[3] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixScale[3] = param;
break;
case GL_POST_COLOR_MATRIX_ALPHA_BIAS:
if (ctx->Pixel.PostColorMatrixBias[3] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostColorMatrixBias[3] = param;
break;
case GL_POST_CONVOLUTION_RED_SCALE:
if (ctx->Pixel.PostConvolutionScale[0] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionScale[0] = param;
break;
case GL_POST_CONVOLUTION_RED_BIAS:
if (ctx->Pixel.PostConvolutionBias[0] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionBias[0] = param;
break;
case GL_POST_CONVOLUTION_GREEN_SCALE:
if (ctx->Pixel.PostConvolutionScale[1] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionScale[1] = param;
break;
case GL_POST_CONVOLUTION_GREEN_BIAS:
if (ctx->Pixel.PostConvolutionBias[1] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionBias[1] = param;
break;
case GL_POST_CONVOLUTION_BLUE_SCALE:
if (ctx->Pixel.PostConvolutionScale[2] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionScale[2] = param;
break;
case GL_POST_CONVOLUTION_BLUE_BIAS:
if (ctx->Pixel.PostConvolutionBias[2] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionBias[2] = param;
break;
case GL_POST_CONVOLUTION_ALPHA_SCALE:
if (ctx->Pixel.PostConvolutionScale[3] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionScale[3] = param;
break;
case GL_POST_CONVOLUTION_ALPHA_BIAS:
if (ctx->Pixel.PostConvolutionBias[3] == param)
return;
FLUSH_VERTICES(ctx, _NEW_PIXEL);
ctx->Pixel.PostConvolutionBias[3] = param;
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
return;
}
}
static void GLAPIENTRY
_mesa_PixelTransferi( GLenum pname, GLint param )
{
_mesa_PixelTransferf( pname, (GLfloat) param );
}
/**********************************************************************/
/***** State Management *****/
/**********************************************************************/
/*
* Return a bitmask of IMAGE_*_BIT flags which to indicate which
* pixel transfer operations are enabled.
*/
static void
update_image_transfer_state(GLcontext *ctx)
{
GLuint mask = 0;
if (ctx->Pixel.RedScale != 1.0F || ctx->Pixel.RedBias != 0.0F ||
ctx->Pixel.GreenScale != 1.0F || ctx->Pixel.GreenBias != 0.0F ||
ctx->Pixel.BlueScale != 1.0F || ctx->Pixel.BlueBias != 0.0F ||
ctx->Pixel.AlphaScale != 1.0F || ctx->Pixel.AlphaBias != 0.0F)
mask |= IMAGE_SCALE_BIAS_BIT;
if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset)
mask |= IMAGE_SHIFT_OFFSET_BIT;
if (ctx->Pixel.MapColorFlag)
mask |= IMAGE_MAP_COLOR_BIT;
if (ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION])
mask |= IMAGE_COLOR_TABLE_BIT;
if (ctx->Pixel.Convolution1DEnabled ||
ctx->Pixel.Convolution2DEnabled ||
ctx->Pixel.Separable2DEnabled) {
mask |= IMAGE_CONVOLUTION_BIT;
if (ctx->Pixel.PostConvolutionScale[0] != 1.0F ||
ctx->Pixel.PostConvolutionScale[1] != 1.0F ||
ctx->Pixel.PostConvolutionScale[2] != 1.0F ||
ctx->Pixel.PostConvolutionScale[3] != 1.0F ||
ctx->Pixel.PostConvolutionBias[0] != 0.0F ||
ctx->Pixel.PostConvolutionBias[1] != 0.0F ||
ctx->Pixel.PostConvolutionBias[2] != 0.0F ||
ctx->Pixel.PostConvolutionBias[3] != 0.0F) {
mask |= IMAGE_POST_CONVOLUTION_SCALE_BIAS;
}
}
if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION])
mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT;
if (ctx->ColorMatrixStack.Top->type != MATRIX_IDENTITY ||
ctx->Pixel.PostColorMatrixScale[0] != 1.0F ||
ctx->Pixel.PostColorMatrixBias[0] != 0.0F ||
ctx->Pixel.PostColorMatrixScale[1] != 1.0F ||
ctx->Pixel.PostColorMatrixBias[1] != 0.0F ||
ctx->Pixel.PostColorMatrixScale[2] != 1.0F ||
ctx->Pixel.PostColorMatrixBias[2] != 0.0F ||
ctx->Pixel.PostColorMatrixScale[3] != 1.0F ||
ctx->Pixel.PostColorMatrixBias[3] != 0.0F)
mask |= IMAGE_COLOR_MATRIX_BIT;
if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX])
mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT;
if (ctx->Pixel.HistogramEnabled)
mask |= IMAGE_HISTOGRAM_BIT;
if (ctx->Pixel.MinMaxEnabled)
mask |= IMAGE_MIN_MAX_BIT;
ctx->_ImageTransferState = mask;
}
/**
* Update mesa pixel transfer derived state.
*/
void _mesa_update_pixel( GLcontext *ctx, GLuint new_state )
{
if (new_state & _NEW_COLOR_MATRIX)
_math_matrix_analyse( ctx->ColorMatrixStack.Top );
/* References ColorMatrix.type (derived above).
*/
if (new_state & _MESA_NEW_TRANSFER_STATE)
update_image_transfer_state(ctx);
}
void
_mesa_init_pixel_dispatch(struct _glapi_table *disp)
{
SET_GetPixelMapfv(disp, _mesa_GetPixelMapfv);
SET_GetPixelMapuiv(disp, _mesa_GetPixelMapuiv);
SET_GetPixelMapusv(disp, _mesa_GetPixelMapusv);
SET_PixelMapfv(disp, _mesa_PixelMapfv);
SET_PixelMapuiv(disp, _mesa_PixelMapuiv);
SET_PixelMapusv(disp, _mesa_PixelMapusv);
SET_PixelTransferf(disp, _mesa_PixelTransferf);
SET_PixelTransferi(disp, _mesa_PixelTransferi);
SET_PixelZoom(disp, _mesa_PixelZoom);
}
#endif /* FEATURE_pixel_transfer */
/**********************************************************************/
/***** Initialization *****/
/**********************************************************************/
static void
init_pixelmap(struct gl_pixelmap *map)
{
map->Size = 1;
map->Map[0] = 0.0;
map->Map8[0] = 0;
}
/**
* Initialize the context's PIXEL attribute group.
*/
void
_mesa_init_pixel( GLcontext *ctx )
{
int i;
/* Pixel group */
ctx->Pixel.RedBias = 0.0;
ctx->Pixel.RedScale = 1.0;
ctx->Pixel.GreenBias = 0.0;
ctx->Pixel.GreenScale = 1.0;
ctx->Pixel.BlueBias = 0.0;
ctx->Pixel.BlueScale = 1.0;
ctx->Pixel.AlphaBias = 0.0;
ctx->Pixel.AlphaScale = 1.0;
ctx->Pixel.DepthBias = 0.0;
ctx->Pixel.DepthScale = 1.0;
ctx->Pixel.IndexOffset = 0;
ctx->Pixel.IndexShift = 0;
ctx->Pixel.ZoomX = 1.0;
ctx->Pixel.ZoomY = 1.0;
ctx->Pixel.MapColorFlag = GL_FALSE;
ctx->Pixel.MapStencilFlag = GL_FALSE;
init_pixelmap(&ctx->PixelMaps.StoS);
init_pixelmap(&ctx->PixelMaps.ItoI);
init_pixelmap(&ctx->PixelMaps.ItoR);
init_pixelmap(&ctx->PixelMaps.ItoG);
init_pixelmap(&ctx->PixelMaps.ItoB);
init_pixelmap(&ctx->PixelMaps.ItoA);
init_pixelmap(&ctx->PixelMaps.RtoR);
init_pixelmap(&ctx->PixelMaps.GtoG);
init_pixelmap(&ctx->PixelMaps.BtoB);
init_pixelmap(&ctx->PixelMaps.AtoA);
ctx->Pixel.HistogramEnabled = GL_FALSE;
ctx->Pixel.MinMaxEnabled = GL_FALSE;
ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
for (i = 0; i < COLORTABLE_MAX; i++) {
ASSIGN_4V(ctx->Pixel.ColorTableScale[i], 1.0, 1.0, 1.0, 1.0);
ASSIGN_4V(ctx->Pixel.ColorTableBias[i], 0.0, 0.0, 0.0, 0.0);
ctx->Pixel.ColorTableEnabled[i] = GL_FALSE;
}
ctx->Pixel.Convolution1DEnabled = GL_FALSE;
ctx->Pixel.Convolution2DEnabled = GL_FALSE;
ctx->Pixel.Separable2DEnabled = GL_FALSE;
for (i = 0; i < 3; i++) {
ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0);
ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE;
ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0);
ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0);
}
for (i = 0; i < MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_WIDTH * 4; i++) {
ctx->Convolution1D.Filter[i] = 0.0;
ctx->Convolution2D.Filter[i] = 0.0;
ctx->Separable2D.Filter[i] = 0.0;
}
ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0);
ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0);
/* GL_SGI_texture_color_table */
ASSIGN_4V(ctx->Pixel.TextureColorTableScale, 1.0, 1.0, 1.0, 1.0);
ASSIGN_4V(ctx->Pixel.TextureColorTableBias, 0.0, 0.0, 0.0, 0.0);
if (ctx->Visual.doubleBufferMode) {
ctx->Pixel.ReadBuffer = GL_BACK;
}
else {
ctx->Pixel.ReadBuffer = GL_FRONT;
}
/* Miscellaneous */
ctx->_ImageTransferState = 0;
}
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