diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2003-03-25 02:26:28 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2003-03-25 02:26:28 +0000 |
| commit | a46bd6f96a78525dc98bcb2176494e6d6dce5dce (patch) | |
| tree | f5e3ca54c429badb8d93a6af3ea18b25ac49eea3 /src/mesa/main/histogram.c | |
| parent | 45bc887da226403f2c41077e40ca38b6f60f1359 (diff) | |
histogram code move, remove s_histogram.[ch] from Makefiles
Diffstat (limited to 'src/mesa/main/histogram.c')
| -rw-r--r-- | src/mesa/main/histogram.c | 74 |
1 files changed, 73 insertions, 1 deletions
diff --git a/src/mesa/main/histogram.c b/src/mesa/main/histogram.c index 2eca44f02f..e96c990f58 100644 --- a/src/mesa/main/histogram.c +++ b/src/mesa/main/histogram.c @@ -1,4 +1,4 @@ -/* $Id: histogram.c,v 1.12 2003/03/01 01:50:21 brianp Exp $ */ +/* $Id: histogram.c,v 1.13 2003/03/25 02:26:29 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -32,6 +32,72 @@ #include "histogram.h" +/********************************************************************** + * Internal functions + */ + + +/* + * Update the min/max values from an array of fragment colors. + */ +void +_mesa_update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4]) +{ + GLuint i; + for (i = 0; i < n; i++) { + /* update mins */ + if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP]) + ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP]; + if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP]) + ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP]; + if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP]) + ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP]; + if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP]) + ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP]; + + /* update maxs */ + if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP]) + ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP]; + if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP]) + ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP]; + if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP]) + ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP]; + if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP]) + ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP]; + } +} + + +/* + * Update the histogram values from an array of fragment colors. + */ +void +_mesa_update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4]) +{ + const GLint max = ctx->Histogram.Width - 1; + GLfloat w = (GLfloat) max; + GLuint i; + + if (ctx->Histogram.Width == 0) + return; + + for (i = 0; i < n; i++) { + GLint ri = IROUND(rgba[i][RCOMP] * w); + GLint gi = IROUND(rgba[i][GCOMP] * w); + GLint bi = IROUND(rgba[i][BCOMP] * w); + GLint ai = IROUND(rgba[i][ACOMP] * w); + ri = CLAMP(ri, 0, max); + gi = CLAMP(gi, 0, max); + bi = CLAMP(bi, 0, max); + ai = CLAMP(ai, 0, max); + ctx->Histogram.Count[ri][RCOMP]++; + ctx->Histogram.Count[gi][GCOMP]++; + ctx->Histogram.Count[bi][BCOMP]++; + ctx->Histogram.Count[ai][ACOMP]++; + } +} + + /* * XXX the packed pixel formats haven't been tested. */ @@ -591,6 +657,12 @@ base_histogram_format( GLenum format ) } + +/********************************************************************** + * API functions + */ + + void _mesa_GetMinmax(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values) { |