diff options
Diffstat (limited to 'mesalib/src/mesa/main/pixeltransfer.c')
| -rw-r--r-- | mesalib/src/mesa/main/pixeltransfer.c | 873 |
1 files changed, 306 insertions, 567 deletions
diff --git a/mesalib/src/mesa/main/pixeltransfer.c b/mesalib/src/mesa/main/pixeltransfer.c index 092ee3a14..5e881436a 100644 --- a/mesalib/src/mesa/main/pixeltransfer.c +++ b/mesalib/src/mesa/main/pixeltransfer.c @@ -1,567 +1,306 @@ -/*
- * 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 "glheader.h"
-#include "colormac.h"
-#include "pixeltransfer.h"
-#include "imports.h"
-#include "mtypes.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)];
- }
-}
-
-/**
- * Apply a color table lookup to an array of floating point RGBA colors.
- */
-void
-_mesa_lookup_rgba_float(const struct gl_color_table *table,
- GLuint n, GLfloat rgba[][4])
-{
- const GLint max = table->Size - 1;
- const GLfloat scale = (GLfloat) max;
- const GLfloat *lut = table->TableF;
- GLuint i;
-
- if (!table->TableF || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- for (i = 0; i < n; i++) {
- GLint jL = IROUND(rgba[i][RCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- GLfloat luminance, alpha;
- jL = CLAMP(jL, 0, max);
- jA = CLAMP(jA, 0, max);
- luminance = lut[jL * 2 + 0];
- alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;;
- }
- break;
- case GL_RED:
- /* replace RGB with RGB */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- }
- break;
- case GL_RG:
- /* replace RG with RG */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- }
- break;
- case GL_RGB:
- /* replace RGB with RGB */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- break;
- case GL_RGBA:
- /* replace RGBA with RGBA */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- jA = CLAMP(jA, 0, max);
- rgba[i][RCOMP] = lut[jR * 4 + 0];
- rgba[i][GCOMP] = lut[jG * 4 + 1];
- rgba[i][BCOMP] = lut[jB * 4 + 2];
- rgba[i][ACOMP] = lut[jA * 4 + 3];
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
- return;
- }
-}
-
-
-
-/**
- * Apply a color table lookup to an array of ubyte/RGBA colors.
- */
-void
-_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
- GLuint n, GLubyte rgba[][4])
-{
- const GLubyte *lut = table->TableUB;
- const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;
- GLuint i;
-
- if (!table->TableUB || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = lut[j];
- }
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];
- GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = l;
- rgba[i][ACOMP] = a;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- GLubyte luminance = lut[jL * 2 + 0];
- GLubyte alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;
- }
- }
- break;
- case GL_RGB:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- }
- break;
- case GL_RGBA:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];
- rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
- }
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");
- return;
- }
-}
-
-
-
-/*
- * 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,
- GLstencil 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] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
- }
- }
-}
+/* + * 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 "glheader.h" +#include "colormac.h" +#include "pixeltransfer.h" +#include "imports.h" +#include "mtypes.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, + GLstencil 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] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ]; + } + } +} |