summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--src/mesa/main/pixel.c107
-rw-r--r--src/mesa/main/pixel.h15
2 files changed, 111 insertions, 11 deletions
diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c
index 90257b7f3d..0952f8cbe9 100644
--- a/src/mesa/main/pixel.c
+++ b/src/mesa/main/pixel.c
@@ -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
@@ -589,6 +589,46 @@ 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.
*/
void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
@@ -612,22 +652,45 @@ 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.
*/
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] )
@@ -698,6 +761,30 @@ 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.
*/
void gl_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
diff --git a/src/mesa/main/pixel.h b/src/mesa/main/pixel.h
index c592d06853..d14b011dc7 100644
--- a/src/mesa/main/pixel.h
+++ b/src/mesa/main/pixel.h
@@ -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] );
generated by cgit v1.2.3 (git 2.51.0) at 2025-10-31 20:49:13 +0000