+/**
+ * Update/replace all or part of a color table. Helper function
+ * used by _mesa_ColorTable() and _mesa_ColorSubTable().
+ * The table->Table buffer should already be allocated.
+ * \param start - first entry to update
+ * \param count - number of entries to update
+ * \param format - format of user-provided table data
+ * \param type - datatype of user-provided table data
+ * \param data - user-provided table data
+ * \param [rgba]Scale - RGBA scale factors
+ * \param [rgba]Bias - RGBA bias factors
+ */
+static void
+store_colortable_entries(GLcontext *ctx, struct gl_color_table *table,
+ GLsizei start, GLsizei count,
+ GLenum format, GLenum type, const GLvoid *data,
+ GLfloat rScale, GLfloat rBias,
+ GLfloat gScale, GLfloat gBias,
+ GLfloat bScale, GLfloat bBias,
+ GLfloat aScale, GLfloat aBias)
+{
+ if (table->Type == GL_FLOAT) {
+ /* convert user-provided data to GLfloat values */
+ GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
+ GLfloat *tableF;
+ GLint i;
+
+ _mesa_unpack_float_color_span(ctx,
+ count, /* number of pixels */
+ table->Format, /* dest format */
+ tempTab, /* dest address */
+ format, type, data, /* src data */
+ &ctx->Unpack,
+ 0, /* transfer ops */
+ GL_FALSE); /* clamping */
+
+ tableF = (GLfloat *) table->Table;
+
+ switch (table->Format) {
+ case GL_INTENSITY:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
+ }
+ break;
+ case GL_LUMINANCE:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
+ }
+ break;
+ case GL_ALPHA:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
+ tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
+ }
+ break;
+ case GL_RGB:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
+ tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
+ tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
+ }
+ break;
+ case GL_RGBA:
+ for (i = 0; i < count; i++) {
+ GLuint j = start + i;
+ tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
+ tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
+ tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
+ tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "Bad format in store_colortable_entries");
+ return;
+ }
+ }
+ else {
+ /* non-float (GLchan) */
+ const GLint comps = _mesa_components_in_format(table->Format);
+ GLchan *dest = (GLchan *) table->Table + start * comps;
+ _mesa_unpack_chan_color_span(ctx, count, /* number of entries */
+ table->Format, /* dest format */
+ dest, /* dest address */
+ format, type, data, /* src data */
+ &ctx->Unpack,
+ 0); /* transfer ops */
+ }
+}
+
+
+
void GLAPIENTRY
_mesa_ColorTable( GLenum target, GLenum internalFormat,
GLsizei width, GLenum format, GLenum type,
FREE(table->Table);
table->Table = NULL;
}
+
if (width > 0) {
if (tableType == GL_FLOAT) {
- GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
- GLfloat *tableF;
- GLint i;
-
- _mesa_unpack_float_color_span(ctx, width, table->Format,
- tempTab, /* dest */
- format, type, data, &ctx->Unpack,
- 0, GL_FALSE);
-
table->Type = GL_FLOAT;
- table->Table = MALLOC(comps * width * sizeof(GLfloat));
- if (!table->Table) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
- return;
- }
-
- tableF = (GLfloat *) table->Table;
-
- switch (table->Format) {
- case GL_INTENSITY:
- for (i = 0; i < width; i++) {
- tableF[i] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
- }
- break;
- case GL_LUMINANCE:
- for (i = 0; i < width; i++) {
- tableF[i] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
- }
- break;
- case GL_ALPHA:
- for (i = 0; i < width; i++) {
- tableF[i] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- case GL_LUMINANCE_ALPHA:
- for (i = 0; i < width; i++) {
- tableF[i*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[i*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- case GL_RGB:
- for (i = 0; i < width; i++) {
- tableF[i*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[i*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
- tableF[i*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
- }
- break;
- case GL_RGBA:
- for (i = 0; i < width; i++) {
- tableF[i*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[i*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
- tableF[i*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
- tableF[i*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- default:
- _mesa_problem(ctx, "Bad format in _mesa_ColorTable");
- return;
- }
- }
- else {
- /* store GLchan table */
+ table->Table = MALLOC(comps * width * sizeof(GLfloat));
+ }
+ else {
table->Type = CHAN_TYPE;
table->Table = MALLOC(comps * width * sizeof(GLchan));
- if (!table->Table) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
- return;
- }
- _mesa_unpack_chan_color_span(ctx, width, table->Format,
- (GLchan *) table->Table, /* dest */
- format, type, data,
- &ctx->Unpack, 0);
- } /* type==GL_FLOAT */
- } /* width > 0 */
+ }
+
+ if (!table->Table) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
+ return;
+ }
+
+ store_colortable_entries(ctx, table,
+ 0, width, /* start, count */
+ format, type, data,
+ rScale, rBias,
+ gScale, gBias,
+ bScale, bBias,
+ aScale, aBias);
+ }
} /* proxy */
if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
return;
}
- if (table->Type != GL_FLOAT) {
- GLchan *dest = (GLchan *) table->Table + start * comps * sizeof(GLchan);
- _mesa_unpack_chan_color_span(ctx, count, table->Format, dest,
- format, type, data, &ctx->Unpack, 0);
- }
- else {
- GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
- GLfloat *tableF;
- GLint i;
-
- ASSERT(table->Type == GL_FLOAT);
-
- _mesa_unpack_float_color_span(ctx, count, table->Format,
- tempTab, /* dest */
- format, type, data, &ctx->Unpack,
- 0, GL_FALSE);
-
- tableF = (GLfloat *) table->Table;
-
- switch (table->Format) {
- case GL_INTENSITY:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
- }
- break;
- case GL_LUMINANCE:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
- }
- break;
- case GL_ALPHA:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- case GL_LUMINANCE_ALPHA:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- case GL_RGB:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
- tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
- }
- break;
- case GL_RGBA:
- for (i = 0; i < count; i++) {
- GLuint j = start + i;
- tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
- tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
- tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
- tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
- }
- break;
- default:
- _mesa_problem(ctx, "Bad format in _mesa_ColorSubTable");
- return;
- }
- }
+ store_colortable_entries(ctx, table, start, count,
+ format, type, data,
+ rScale, rBias,
+ gScale, gBias,
+ bScale, bBias,
+ aScale, aBias);
if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
/* per-texture object palette */
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