}
}
-/**
- * Apply a color table lookup to an array of floating point RGBA colors.
- */
-void
-_mesa_lookup_rgba_float(const struct gl_color_table *table,
- GLuint n, GLfloat rgba[][4])
-{
- const GLint max = table->Size - 1;
- const GLfloat scale = (GLfloat) max;
- const GLfloat *lut = table->TableF;
- GLuint i;
-
- if (!table->TableF || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][RCOMP] * scale);
- GLfloat c = lut[CLAMP(j, 0, max)];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- for (i = 0; i < n; i++) {
- GLint j = IROUND(rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- for (i = 0; i < n; i++) {
- GLint jL = IROUND(rgba[i][RCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- GLfloat luminance, alpha;
- jL = CLAMP(jL, 0, max);
- jA = CLAMP(jA, 0, max);
- luminance = lut[jL * 2 + 0];
- alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;;
- }
- break;
- case GL_RED:
- /* replace RGB with RGB */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- }
- break;
- case GL_RG:
- /* replace RG with RG */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- }
- break;
- case GL_RGB:
- /* replace RGB with RGB */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- break;
- case GL_RGBA:
- /* replace RGBA with RGBA */
- for (i = 0; i < n; i++) {
- GLint jR = IROUND(rgba[i][RCOMP] * scale);
- GLint jG = IROUND(rgba[i][GCOMP] * scale);
- GLint jB = IROUND(rgba[i][BCOMP] * scale);
- GLint jA = IROUND(rgba[i][ACOMP] * scale);
- jR = CLAMP(jR, 0, max);
- jG = CLAMP(jG, 0, max);
- jB = CLAMP(jB, 0, max);
- jA = CLAMP(jA, 0, max);
- rgba[i][RCOMP] = lut[jR * 4 + 0];
- rgba[i][GCOMP] = lut[jG * 4 + 1];
- rgba[i][BCOMP] = lut[jB * 4 + 2];
- rgba[i][ACOMP] = lut[jA * 4 + 3];
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
- return;
- }
-}
-
-
-
-/**
- * Apply a color table lookup to an array of ubyte/RGBA colors.
- */
-void
-_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
- GLuint n, GLubyte rgba[][4])
-{
- const GLubyte *lut = table->TableUB;
- const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;
- GLuint i;
-
- if (!table->TableUB || table->Size == 0)
- return;
-
- switch (table->_BaseFormat) {
- case GL_INTENSITY:
- /* replace RGBA with I */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] =
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE:
- /* replace RGB with L */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- const GLubyte c = lut[rgba[i][RCOMP]];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = c;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = lut[j];
- }
- }
- break;
- case GL_ALPHA:
- /* replace A with A */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- rgba[i][ACOMP] = lut[j];
- }
- }
- break;
- case GL_LUMINANCE_ALPHA:
- /* replace RGBA with LLLA */
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];
- GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = l;
- rgba[i][ACOMP] = a;
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- GLubyte luminance = lut[jL * 2 + 0];
- GLubyte alpha = lut[jA * 2 + 1];
- rgba[i][RCOMP] =
- rgba[i][GCOMP] =
- rgba[i][BCOMP] = luminance;
- rgba[i][ACOMP] = alpha;
- }
- }
- break;
- case GL_RGB:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- rgba[i][RCOMP] = lut[jR * 3 + 0];
- rgba[i][GCOMP] = lut[jG * 3 + 1];
- rgba[i][BCOMP] = lut[jB * 3 + 2];
- }
- }
- break;
- case GL_RGBA:
- if (table->Size == 256) {
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];
- rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];
- rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];
- rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];
- }
- }
- else {
- for (i = 0; i < n; i++) {
- GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
- GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
- GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
- GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
- CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
- }
- }
- break;
- default:
- _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");
- return;
- }
-}
-
-
-
/*
* Map color indexes to float rgba values.
*/