-#if FEATURE_colortable
-
-
-/**
- * Given an internalFormat token passed to glColorTable,
- * return the corresponding base format.
- * Return -1 if invalid token.
- */
-static GLint
-base_colortab_format( GLenum format )
-{
- switch (format) {
- case GL_ALPHA:
- case GL_ALPHA4:
- case GL_ALPHA8:
- case GL_ALPHA12:
- case GL_ALPHA16:
- return GL_ALPHA;
- case GL_LUMINANCE:
- case GL_LUMINANCE4:
- case GL_LUMINANCE8:
- case GL_LUMINANCE12:
- case GL_LUMINANCE16:
- return GL_LUMINANCE;
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE4_ALPHA4:
- case GL_LUMINANCE6_ALPHA2:
- case GL_LUMINANCE8_ALPHA8:
- case GL_LUMINANCE12_ALPHA4:
- case GL_LUMINANCE12_ALPHA12:
- case GL_LUMINANCE16_ALPHA16:
- return GL_LUMINANCE_ALPHA;
- case GL_INTENSITY:
- case GL_INTENSITY4:
- case GL_INTENSITY8:
- case GL_INTENSITY12:
- case GL_INTENSITY16:
- return GL_INTENSITY;
- case GL_RGB:
- case GL_R3_G3_B2:
- case GL_RGB4:
- case GL_RGB5:
- case GL_RGB8:
- case GL_RGB10:
- case GL_RGB12:
- case GL_RGB16:
- return GL_RGB;
- case GL_RGBA:
- case GL_RGBA2:
- case GL_RGBA4:
- case GL_RGB5_A1:
- case GL_RGBA8:
- case GL_RGB10_A2:
- case GL_RGBA12:
- case GL_RGBA16:
- return GL_RGBA;
- default:
- return -1; /* error */
- }
-}
-
-
-
-/**
- * Examine table's format and set the component sizes accordingly.
- */
-static void
-set_component_sizes( struct gl_color_table *table )
-{
- /* assuming the ubyte table */
- const GLubyte sz = 8;
-
- switch (table->_BaseFormat) {
- case GL_ALPHA:
- table->RedSize = 0;
- table->GreenSize = 0;
- table->BlueSize = 0;
- table->AlphaSize = sz;
- table->IntensitySize = 0;
- table->LuminanceSize = 0;
- break;
- case GL_LUMINANCE:
- table->RedSize = 0;
- table->GreenSize = 0;
- table->BlueSize = 0;
- table->AlphaSize = 0;
- table->IntensitySize = 0;
- table->LuminanceSize = sz;
- break;
- case GL_LUMINANCE_ALPHA:
- table->RedSize = 0;
- table->GreenSize = 0;
- table->BlueSize = 0;
- table->AlphaSize = sz;
- table->IntensitySize = 0;
- table->LuminanceSize = sz;
- break;
- case GL_INTENSITY:
- table->RedSize = 0;
- table->GreenSize = 0;
- table->BlueSize = 0;
- table->AlphaSize = 0;
- table->IntensitySize = sz;
- table->LuminanceSize = 0;
- break;
- case GL_RGB:
- table->RedSize = sz;
- table->GreenSize = sz;
- table->BlueSize = sz;
- table->AlphaSize = 0;
- table->IntensitySize = 0;
- table->LuminanceSize = 0;
- break;
- case GL_RGBA:
- table->RedSize = sz;
- table->GreenSize = sz;
- table->BlueSize = sz;
- table->AlphaSize = sz;
- table->IntensitySize = 0;
- table->LuminanceSize = 0;
- break;
- default:
- _mesa_problem(NULL, "unexpected format in set_component_sizes");
- }
-}
-
-
-
-/**
- * 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)
-{
- data = _mesa_map_validate_pbo_source(ctx,
- 1, &ctx->Unpack, count, 1, 1,
- format, type, data,
- "glColor[Sub]Table");
- if (!data)
- return;
-
- {
- /* convert user-provided data to GLfloat values */
- GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
- GLfloat *tableF;
- GLint i;
-
- _mesa_unpack_color_span_float(ctx,
- count, /* number of pixels */
- table->_BaseFormat, /* dest format */
- tempTab, /* dest address */
- format, type, /* src format/type */
- data, /* src data */
- &ctx->Unpack,
- IMAGE_CLAMP_BIT); /* transfer ops */
-
- /* the destination */
- tableF = table->TableF;
-
- /* Apply scale & bias & clamp now */
- switch (table->_BaseFormat) {
- 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;
- }
- }
-
- /* update the ubyte table */
- {
- const GLint comps = _mesa_components_in_format(table->_BaseFormat);
- const GLfloat *tableF = table->TableF + start * comps;
- GLubyte *tableUB = table->TableUB + start * comps;
- GLint i;
- for (i = 0; i < count * comps; i++) {
- CLAMPED_FLOAT_TO_UBYTE(tableUB[i], tableF[i]);
- }
- }
-
- _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
-}
-
-
-