mirror of
https://github.com/reactos/reactos.git
synced 2024-11-04 05:43:30 +00:00
527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
299 lines
9.2 KiB
C
299 lines
9.2 KiB
C
/*
|
|
* Mesa 3-D graphics library
|
|
*
|
|
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
|
|
* Copyright (C) 2009-2010 VMware, Inc. 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
|
|
* THE AUTHORS 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 pixeltransfer.c
|
|
* Pixel transfer operations (scale, bias, table lookups, etc)
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
|
|
/*
|
|
* Apply scale and bias factors to an array of RGBA pixels.
|
|
*/
|
|
void
|
|
_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],
|
|
GLfloat rScale, GLfloat gScale,
|
|
GLfloat bScale, GLfloat aScale,
|
|
GLfloat rBias, GLfloat gBias,
|
|
GLfloat bBias, GLfloat aBias)
|
|
{
|
|
if (rScale != 1.0 || rBias != 0.0) {
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;
|
|
}
|
|
}
|
|
if (gScale != 1.0 || gBias != 0.0) {
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;
|
|
}
|
|
}
|
|
if (bScale != 1.0 || bBias != 0.0) {
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;
|
|
}
|
|
}
|
|
if (aScale != 1.0 || aBias != 0.0) {
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Apply pixel mapping to an array of floating point RGBA pixels.
|
|
*/
|
|
void
|
|
_mesa_map_rgba( const struct gl_context *ctx, GLuint n, GLfloat rgba[][4] )
|
|
{
|
|
const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1);
|
|
const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);
|
|
const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);
|
|
const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);
|
|
const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;
|
|
const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;
|
|
const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;
|
|
const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;
|
|
GLuint i;
|
|
for (i=0;i<n;i++) {
|
|
GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
|
|
GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
|
|
GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
|
|
GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
|
|
rgba[i][RCOMP] = rMap[IROUND(r * rscale)];
|
|
rgba[i][GCOMP] = gMap[IROUND(g * gscale)];
|
|
rgba[i][BCOMP] = bMap[IROUND(b * bscale)];
|
|
rgba[i][ACOMP] = aMap[IROUND(a * ascale)];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Map color indexes to float rgba values.
|
|
*/
|
|
void
|
|
_mesa_map_ci_to_rgba( const struct gl_context *ctx, GLuint n,
|
|
const GLuint index[], GLfloat rgba[][4] )
|
|
{
|
|
GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
|
|
GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
|
|
GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
|
|
GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
|
|
const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;
|
|
const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;
|
|
const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;
|
|
const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;
|
|
GLuint i;
|
|
for (i=0;i<n;i++) {
|
|
rgba[i][RCOMP] = rMap[index[i] & rmask];
|
|
rgba[i][GCOMP] = gMap[index[i] & gmask];
|
|
rgba[i][BCOMP] = bMap[index[i] & bmask];
|
|
rgba[i][ACOMP] = aMap[index[i] & amask];
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Map ubyte color indexes to ubyte/RGBA values.
|
|
*/
|
|
void
|
|
_mesa_map_ci8_to_rgba8(const struct gl_context *ctx,
|
|
GLuint n, const GLubyte index[],
|
|
GLubyte rgba[][4])
|
|
{
|
|
GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
|
|
GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
|
|
GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
|
|
GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
|
|
const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;
|
|
const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;
|
|
const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;
|
|
const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;
|
|
GLuint i;
|
|
for (i=0;i<n;i++) {
|
|
rgba[i][RCOMP] = rMap[index[i] & rmask];
|
|
rgba[i][GCOMP] = gMap[index[i] & gmask];
|
|
rgba[i][BCOMP] = bMap[index[i] & bmask];
|
|
rgba[i][ACOMP] = aMap[index[i] & amask];
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
_mesa_scale_and_bias_depth(const struct gl_context *ctx, GLuint n,
|
|
GLfloat depthValues[])
|
|
{
|
|
const GLfloat scale = ctx->Pixel.DepthScale;
|
|
const GLfloat bias = ctx->Pixel.DepthBias;
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
GLfloat d = depthValues[i] * scale + bias;
|
|
depthValues[i] = CLAMP(d, 0.0F, 1.0F);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
_mesa_scale_and_bias_depth_uint(const struct gl_context *ctx, GLuint n,
|
|
GLuint depthValues[])
|
|
{
|
|
const GLdouble max = (double) 0xffffffff;
|
|
const GLdouble scale = ctx->Pixel.DepthScale;
|
|
const GLdouble bias = ctx->Pixel.DepthBias * max;
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
GLdouble d = (GLdouble) depthValues[i] * scale + bias;
|
|
d = CLAMP(d, 0.0, max);
|
|
depthValues[i] = (GLuint) d;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Apply various pixel transfer operations to an array of RGBA pixels
|
|
* as indicated by the transferOps bitmask
|
|
*/
|
|
void
|
|
_mesa_apply_rgba_transfer_ops(struct gl_context *ctx, GLbitfield transferOps,
|
|
GLuint n, GLfloat rgba[][4])
|
|
{
|
|
/* scale & bias */
|
|
if (transferOps & IMAGE_SCALE_BIAS_BIT) {
|
|
_mesa_scale_and_bias_rgba(n, rgba,
|
|
ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
|
|
ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
|
|
ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
|
|
ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
|
|
}
|
|
/* color map lookup */
|
|
if (transferOps & IMAGE_MAP_COLOR_BIT) {
|
|
_mesa_map_rgba( ctx, n, rgba );
|
|
}
|
|
|
|
/* clamping to [0,1] */
|
|
if (transferOps & IMAGE_CLAMP_BIT) {
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
|
|
rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
|
|
rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
|
|
rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Apply color index shift and offset to an array of pixels.
|
|
*/
|
|
void
|
|
_mesa_shift_and_offset_ci(const struct gl_context *ctx,
|
|
GLuint n, GLuint indexes[])
|
|
{
|
|
GLint shift = ctx->Pixel.IndexShift;
|
|
GLint offset = ctx->Pixel.IndexOffset;
|
|
GLuint i;
|
|
if (shift > 0) {
|
|
for (i=0;i<n;i++) {
|
|
indexes[i] = (indexes[i] << shift) + offset;
|
|
}
|
|
}
|
|
else if (shift < 0) {
|
|
shift = -shift;
|
|
for (i=0;i<n;i++) {
|
|
indexes[i] = (indexes[i] >> shift) + offset;
|
|
}
|
|
}
|
|
else {
|
|
for (i=0;i<n;i++) {
|
|
indexes[i] = indexes[i] + offset;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Apply color index shift, offset and table lookup to an array
|
|
* of color indexes;
|
|
*/
|
|
void
|
|
_mesa_apply_ci_transfer_ops(const struct gl_context *ctx,
|
|
GLbitfield transferOps,
|
|
GLuint n, GLuint indexes[])
|
|
{
|
|
if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
|
|
_mesa_shift_and_offset_ci(ctx, n, indexes);
|
|
}
|
|
if (transferOps & IMAGE_MAP_COLOR_BIT) {
|
|
const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
const GLuint j = indexes[i] & mask;
|
|
indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Apply stencil index shift, offset and table lookup to an array
|
|
* of stencil values.
|
|
*/
|
|
void
|
|
_mesa_apply_stencil_transfer_ops(const struct gl_context *ctx, GLuint n,
|
|
GLubyte stencil[])
|
|
{
|
|
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
|
|
const GLint offset = ctx->Pixel.IndexOffset;
|
|
GLint shift = ctx->Pixel.IndexShift;
|
|
GLuint i;
|
|
if (shift > 0) {
|
|
for (i = 0; i < n; i++) {
|
|
stencil[i] = (stencil[i] << shift) + offset;
|
|
}
|
|
}
|
|
else if (shift < 0) {
|
|
shift = -shift;
|
|
for (i = 0; i < n; i++) {
|
|
stencil[i] = (stencil[i] >> shift) + offset;
|
|
}
|
|
}
|
|
else {
|
|
for (i = 0; i < n; i++) {
|
|
stencil[i] = stencil[i] + offset;
|
|
}
|
|
}
|
|
}
|
|
if (ctx->Pixel.MapStencilFlag) {
|
|
GLuint mask = ctx->PixelMaps.StoS.Size - 1;
|
|
GLuint i;
|
|
for (i = 0; i < n; i++) {
|
|
stencil[i] = (GLubyte) ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
|
|
}
|
|
}
|
|
}
|