Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-12-29 10:35:28 +00:00
Code Issues Projects Releases Packages Wiki Activity
reactos/dll/opengl/mesa/main/pixel.c

588 lines
15 KiB
C
Raw Blame History

/*
* 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 <precomp.h>
#if FEATURE_pixel_transfer
/**********************************************************************/
/***** glPixelZoom *****/
/**********************************************************************/
static void GLAPIENTRY
_mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(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(struct gl_context *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(struct gl_context *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);
}
}
}
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 (!values) {
return;
}
store_pixelmap(ctx, map, mapsize, values);
}
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 (!values) {
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] );
}
}
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 (!values) {
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] );
}
}
store_pixelmap(ctx, map, mapsize, fvalues);
}
static void GLAPIENTRY
_mesa_GetPixelMapfv( GLenum map, GLfloat *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, "glGetPixelMapfv(map)");
return;
}
mapsize = pm->Size;
if (!values) {
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));
}
}
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 (!values) {
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] );
}
}
}
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->Size;
if (!values) {
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] );
}
}
}
/**********************************************************************/
/***** glPixelTransfer *****/
/**********************************************************************/
/*
* Implements glPixelTransfer[fi] whether called immediately or from a
* display list.
*/
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;
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(struct gl_context *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;
ctx->_ImageTransferState = mask;
}
/**
* Update mesa pixel transfer derived state.
*/
void _mesa_update_pixel( struct gl_context *ctx, GLuint new_state )
{
if (new_state & _NEW_PIXEL)
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( struct gl_context *ctx )
{
/* 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);
if (ctx->Visual.doubleBufferMode) {
ctx->Pixel.ReadBuffer = GL_BACK;
}
else {
ctx->Pixel.ReadBuffer = GL_FRONT;
}
/* Miscellaneous */
ctx->_ImageTransferState = 0;
}
Reference in a new issue View git blame Copy permalink