AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

added a few more scale/bias/lookup functions (for future use)

Browse Source
This commit is contained in:
Brian Paul
1999-10-30 08:20:57 +00:00
parent 8de4a38777
commit 3c14ec9b55
2 changed files with 111 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/main/pixel.c
+97 -10
View File
@@ -1,4 +1,4 @@
/* $Id: pixel.c,v 1.2 1999/10/08 09:27:11 keithw Exp $ */
/* $Id: pixel.c,v 1.3 1999/10/30 08:20:57 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -588,6 +588,46 @@ void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
}
/*
* Apply scale and bias factors to an array of RGBA pixels.
*/
void gl_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
{
if (ctx->Pixel.RedScale != 1.0 || ctx->Pixel.RedBias != 0.0) {
const GLfloat scale = ctx->Pixel.RedScale;
const GLfloat bias = ctx->Pixel.RedBias;
GLuint i;
for (i = 0; i < n; i++) {
rgba[i][RCOMP] = rgba[i][RCOMP] * scale + bias;
}
}
if (ctx->Pixel.GreenScale != 1.0 || ctx->Pixel.GreenBias != 0.0) {
const GLfloat scale = ctx->Pixel.GreenScale;
const GLfloat bias = ctx->Pixel.GreenBias;
GLuint i;
for (i = 0; i < n; i++) {
rgba[i][GCOMP] = rgba[i][GCOMP] * scale + bias;
}
}
if (ctx->Pixel.BlueScale != 1.0 || ctx->Pixel.BlueBias != 0.0) {
const GLfloat scale = ctx->Pixel.BlueScale;
const GLfloat bias = ctx->Pixel.BlueBias;
GLuint i;
for (i = 0; i < n; i++) {
rgba[i][BCOMP] = rgba[i][BCOMP] * scale + bias;
}
}
if (ctx->Pixel.AlphaScale != 1.0 || ctx->Pixel.AlphaBias != 0.0) {
const GLfloat scale = ctx->Pixel.AlphaScale;
const GLfloat bias = ctx->Pixel.AlphaBias;
GLuint i;
for (i = 0; i < n; i++) {
rgba[i][ACOMP] = rgba[i][ACOMP] * scale + bias;
}
}
}
/*
* Apply pixel mapping to an array of RGBA pixels.
*/
@@ -611,6 +651,29 @@ void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
}
/*
* Apply pixel mapping to an array of floating point RGBA pixels.
*/
void gl_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
{
const GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
const GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
const GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
const GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
const GLfloat *rMap = ctx->Pixel.MapRtoR;
const GLfloat *gMap = ctx->Pixel.MapGtoG;
const GLfloat *bMap = ctx->Pixel.MapBtoB;
const GLfloat *aMap = ctx->Pixel.MapAtoA;
GLuint i;
for (i=0;i<n;i++) {
rgba[i][RCOMP] = rMap[(GLint) (rgba[i][RCOMP] * rscale + 0.5F)];
rgba[i][GCOMP] = gMap[(GLint) (rgba[i][GCOMP] * gscale + 0.5F)];
rgba[i][BCOMP] = bMap[(GLint) (rgba[i][BCOMP] * bscale + 0.5F)];
rgba[i][ACOMP] = aMap[(GLint) (rgba[i][ACOMP] * ascale + 0.5F)];
}
}
/*
* Apply pixel mapping to an array of RGBA pixels.
*/
@@ -618,16 +681,16 @@ void gl_map_color( const GLcontext *ctx, GLuint n,
GLfloat red[], GLfloat green[],
GLfloat blue[], GLfloat alpha[] )
{
GLfloat rscale = ctx->Pixel.MapRtoRsize-1;
GLfloat gscale = ctx->Pixel.MapGtoGsize-1;
GLfloat bscale = ctx->Pixel.MapBtoBsize-1;
GLfloat ascale = ctx->Pixel.MapAtoAsize-1;
GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
GLuint i;
for (i=0;i<n;i++) {
red[i] = ctx->Pixel.MapRtoR[ (GLint) (red[i] * rscale) ];
green[i] = ctx->Pixel.MapGtoG[ (GLint) (green[i] * gscale) ];
blue[i] = ctx->Pixel.MapBtoB[ (GLint) (blue[i] * bscale) ];
alpha[i] = ctx->Pixel.MapAtoA[ (GLint) (alpha[i] * ascale) ];
red[i] = ctx->Pixel.MapRtoR[ (GLint) (red[i] * rscale + 0.5F) ];
green[i] = ctx->Pixel.MapGtoG[ (GLint) (green[i] * gscale + 0.5F) ];
blue[i] = ctx->Pixel.MapBtoB[ (GLint) (blue[i] * bscale + 0.5F) ];
alpha[i] = ctx->Pixel.MapAtoA[ (GLint) (alpha[i] * ascale + 0.5F) ];
}
}
@@ -674,7 +737,7 @@ void gl_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
/*
* Map color indexes to rgb values.
* Map color indexes to rgba values.
*/
void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
GLubyte rgba[][4] )
@@ -697,6 +760,30 @@ void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
}
/*
* Map color indexes to float rgba values.
*/
void gl_map_ci_to_rgba_float( const GLcontext *ctx, GLuint n, const GLuint index[],
GLfloat rgba[][4] )
{
GLuint rmask = ctx->Pixel.MapItoRsize - 1;
GLuint gmask = ctx->Pixel.MapItoGsize - 1;
GLuint bmask = ctx->Pixel.MapItoBsize - 1;
GLuint amask = ctx->Pixel.MapItoAsize - 1;
const GLfloat *rMap = ctx->Pixel.MapItoR;
const GLfloat *gMap = ctx->Pixel.MapItoG;
const GLfloat *bMap = ctx->Pixel.MapItoB;
const GLfloat *aMap = ctx->Pixel.MapItoA;
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 8-bit color indexes to rgb values.
*/
src/mesa/main/pixel.h
+14 -1
View File
@@ -1,4 +1,4 @@
/* $Id: pixel.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
/* $Id: pixel.h,v 1.2 1999/10/30 08:20:57 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -70,9 +70,17 @@ extern void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n,
GLubyte rgba[][4] );
extern void gl_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n,
GLfloat rgba[][4] );
extern void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] );
extern void gl_map_rgba_float( const GLcontext *ctx, GLuint n,
GLfloat rgba[][4] );
extern void gl_map_color( const GLcontext *ctx, GLuint n,
GLfloat red[], GLfloat green[],
GLfloat blue[], GLfloat alpha[] );
@@ -90,6 +98,11 @@ extern void gl_map_ci_to_rgba( const GLcontext *ctx,
GLubyte rgba[][4] );
extern void gl_map_ci_to_rgba_float( const GLcontext *ctx,
GLuint n, const GLuint index[],
GLfloat rgba[][4] );
extern void gl_map_ci8_to_rgba( const GLcontext *ctx,
GLuint n, const GLubyte index[],
GLubyte rgba[][4] );