-
-
-
-/*
- * XXX the packed pixel formats haven't been tested.
- */
-static void
-pack_histogram( GLcontext *ctx,
- GLuint n, CONST GLuint rgba[][4],
- GLenum format, GLenum type, GLvoid *destination,
- const struct gl_pixelstore_attrib *packing )
-{
- const GLint comps = _mesa_components_in_format(format);
- GLuint luminance[MAX_WIDTH];
-
- if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) {
- GLuint i;
- for (i = 0; i < n; i++) {
- luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
- }
- }
-
-#define PACK_MACRO(TYPE) \
- { \
- GLuint i; \
- switch (format) { \
- case GL_RED: \
- for (i=0;i<n;i++) \
- dst[i] = (TYPE) rgba[i][RCOMP]; \
- break; \
- case GL_GREEN: \
- for (i=0;i<n;i++) \
- dst[i] = (TYPE) rgba[i][GCOMP]; \
- break; \
- case GL_BLUE: \
- for (i=0;i<n;i++) \
- dst[i] = (TYPE) rgba[i][BCOMP]; \
- break; \
- case GL_ALPHA: \
- for (i=0;i<n;i++) \
- dst[i] = (TYPE) rgba[i][ACOMP]; \
- break; \
- case GL_LUMINANCE: \
- for (i=0;i<n;i++) \
- dst[i] = (TYPE) luminance[i]; \
- break; \
- case GL_LUMINANCE_ALPHA: \
- for (i=0;i<n;i++) { \
- dst[i*2+0] = (TYPE) luminance[i]; \
- dst[i*2+1] = (TYPE) rgba[i][ACOMP]; \
- } \
- break; \
- case GL_RGB: \
- for (i=0;i<n;i++) { \
- dst[i*3+0] = (TYPE) rgba[i][RCOMP]; \
- dst[i*3+1] = (TYPE) rgba[i][GCOMP]; \
- dst[i*3+2] = (TYPE) rgba[i][BCOMP]; \
- } \
- break; \
- case GL_RGBA: \
- for (i=0;i<n;i++) { \
- dst[i*4+0] = (TYPE) rgba[i][RCOMP]; \
- dst[i*4+1] = (TYPE) rgba[i][GCOMP]; \
- dst[i*4+2] = (TYPE) rgba[i][BCOMP]; \
- dst[i*4+3] = (TYPE) rgba[i][ACOMP]; \
- } \
- break; \
- case GL_BGR: \
- for (i=0;i<n;i++) { \
- dst[i*3+0] = (TYPE) rgba[i][BCOMP]; \
- dst[i*3+1] = (TYPE) rgba[i][GCOMP]; \
- dst[i*3+2] = (TYPE) rgba[i][RCOMP]; \
- } \
- break; \
- case GL_BGRA: \
- for (i=0;i<n;i++) { \
- dst[i*4+0] = (TYPE) rgba[i][BCOMP]; \
- dst[i*4+1] = (TYPE) rgba[i][GCOMP]; \
- dst[i*4+2] = (TYPE) rgba[i][RCOMP]; \
- dst[i*4+3] = (TYPE) rgba[i][ACOMP]; \
- } \
- break; \
- case GL_ABGR_EXT: \
- for (i=0;i<n;i++) { \
- dst[i*4+0] = (TYPE) rgba[i][ACOMP]; \
- dst[i*4+1] = (TYPE) rgba[i][BCOMP]; \
- dst[i*4+2] = (TYPE) rgba[i][GCOMP]; \
- dst[i*4+3] = (TYPE) rgba[i][RCOMP]; \
- } \
- break; \
- default: \
- _mesa_problem(ctx, "bad format in pack_histogram"); \
- } \
- }
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) destination;
- PACK_MACRO(GLubyte);
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) destination;
- PACK_MACRO(GLbyte);
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) destination;
- PACK_MACRO(GLushort);
- if (packing->SwapBytes) {
- _mesa_swap2(dst, n * comps);
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) destination;
- PACK_MACRO(GLshort);
- if (packing->SwapBytes) {
- _mesa_swap2((GLushort *) dst, n * comps);
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) destination;
- PACK_MACRO(GLuint);
- if (packing->SwapBytes) {
- _mesa_swap4(dst, n * comps);
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) destination;
- PACK_MACRO(GLint);
- if (packing->SwapBytes) {
- _mesa_swap4((GLuint *) dst, n * comps);
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) destination;
- PACK_MACRO(GLfloat);
- if (packing->SwapBytes) {
- _mesa_swap4((GLuint *) dst, n * comps);
- }
- }
- break;
- case GL_HALF_FLOAT_ARB:
- {
- /* temporarily store as GLuints */
- GLuint temp[4*HISTOGRAM_TABLE_SIZE];
- GLhalfARB *dst = (GLhalfARB *) destination;
- GLuint i;
- /* get GLuint values */
- PACK_MACRO(GLuint);
- /* convert to GLhalf */
- for (i = 0; i < n * comps; i++) {
- dst[i] = _mesa_float_to_half((GLfloat) temp[i]);
- }
- if (packing->SwapBytes) {
- _mesa_swap2((GLushort *) dst, n * comps);
- }
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- if (format == GL_RGB) {
- GLubyte *dst = (GLubyte *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x7) << 5)
- | ((rgba[i][GCOMP] & 0x7) << 2)
- | ((rgba[i][BCOMP] & 0x3) );
- }
- }
- else {
- GLubyte *dst = (GLubyte *) destination;
- GLuint i;
- ASSERT(format == GL_BGR);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x7) << 5)
- | ((rgba[i][GCOMP] & 0x7) << 2)
- | ((rgba[i][RCOMP] & 0x3) );
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- if (format == GL_RGB) {
- GLubyte *dst = (GLubyte *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x3) << 6)
- | ((rgba[i][GCOMP] & 0x7) << 3)
- | ((rgba[i][BCOMP] & 0x7) );
- }
- }
- else {
- GLubyte *dst = (GLubyte *) destination;
- GLuint i;
- ASSERT(format == GL_BGR);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x3) << 6)
- | ((rgba[i][GCOMP] & 0x7) << 3)
- | ((rgba[i][RCOMP] & 0x7) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x3f) << 5)
- | ((rgba[i][BCOMP] & 0x1f) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_BGR);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x3f) << 5)
- | ((rgba[i][RCOMP] & 0x1f) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x3f) << 5)
- | ((rgba[i][RCOMP] & 0x1f) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_BGR);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x3f) << 5)
- | ((rgba[i][BCOMP] & 0x1f) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- if (format == GL_RGBA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0xf) << 12)
- | ((rgba[i][GCOMP] & 0xf) << 8)
- | ((rgba[i][BCOMP] & 0xf) << 4)
- | ((rgba[i][ACOMP] & 0xf) );
- }
- }
- else if (format == GL_BGRA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0xf) << 12)
- | ((rgba[i][GCOMP] & 0xf) << 8)
- | ((rgba[i][RCOMP] & 0xf) << 4)
- | ((rgba[i][ACOMP] & 0xf) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
- | ((rgba[i][BCOMP] & 0xf) << 8)
- | ((rgba[i][GCOMP] & 0xf) << 4)
- | ((rgba[i][RCOMP] & 0xf) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- if (format == GL_RGBA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
- | ((rgba[i][BCOMP] & 0xf) << 8)
- | ((rgba[i][GCOMP] & 0xf) << 4)
- | ((rgba[i][RCOMP] & 0xf) );
- }
- }
- else if (format == GL_BGRA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xf) << 12)
- | ((rgba[i][RCOMP] & 0xf) << 8)
- | ((rgba[i][GCOMP] & 0xf) << 4)
- | ((rgba[i][BCOMP] & 0xf) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0xf) << 12)
- | ((rgba[i][GCOMP] & 0xf) << 8)
- | ((rgba[i][BCOMP] & 0xf) << 4)
- | ((rgba[i][ACOMP] & 0xf) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- if (format == GL_RGBA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x1f) << 6)
- | ((rgba[i][BCOMP] & 0x1f) << 1)
- | ((rgba[i][ACOMP] & 0x1) );
- }
- }
- else if (format == GL_BGRA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x1f) << 6)
- | ((rgba[i][RCOMP] & 0x1f) << 1)
- | ((rgba[i][ACOMP] & 0x1) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
- | ((rgba[i][BCOMP] & 0x1f) << 6)
- | ((rgba[i][GCOMP] & 0x1f) << 1)
- | ((rgba[i][RCOMP] & 0x1) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (format == GL_RGBA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
- | ((rgba[i][BCOMP] & 0x1f) << 6)
- | ((rgba[i][GCOMP] & 0x1f) << 1)
- | ((rgba[i][RCOMP] & 0x1) );
- }
- }
- else if (format == GL_BGRA) {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x1f) << 11)
- | ((rgba[i][RCOMP] & 0x1f) << 6)
- | ((rgba[i][GCOMP] & 0x1f) << 1)
- | ((rgba[i][BCOMP] & 0x1) );
- }
- }
- else {
- GLushort *dst = (GLushort *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x1f) << 11)
- | ((rgba[i][GCOMP] & 0x1f) << 6)
- | ((rgba[i][BCOMP] & 0x1f) << 1)
- | ((rgba[i][ACOMP] & 0x1) );
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0xff) << 24)
- | ((rgba[i][GCOMP] & 0xff) << 16)
- | ((rgba[i][BCOMP] & 0xff) << 8)
- | ((rgba[i][ACOMP] & 0xff) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0xff) << 24)
- | ((rgba[i][GCOMP] & 0xff) << 16)
- | ((rgba[i][RCOMP] & 0xff) << 8)
- | ((rgba[i][ACOMP] & 0xff) );
- }
- }
- else {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
- | ((rgba[i][BCOMP] & 0xff) << 16)
- | ((rgba[i][GCOMP] & 0xff) << 8)
- | ((rgba[i][RCOMP] & 0xff) );
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
- | ((rgba[i][BCOMP] & 0xff) << 16)
- | ((rgba[i][GCOMP] & 0xff) << 8)
- | ((rgba[i][RCOMP] & 0xff) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0xff) << 24)
- | ((rgba[i][RCOMP] & 0xff) << 16)
- | ((rgba[i][GCOMP] & 0xff) << 8)
- | ((rgba[i][BCOMP] & 0xff) );
- }
- }
- else {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0xff) << 24)
- | ((rgba[i][GCOMP] & 0xff) << 16)
- | ((rgba[i][BCOMP] & 0xff) << 8)
- | ((rgba[i][ACOMP] & 0xff) );
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x3ff) << 22)
- | ((rgba[i][GCOMP] & 0x3ff) << 12)
- | ((rgba[i][BCOMP] & 0x3ff) << 2)
- | ((rgba[i][ACOMP] & 0x3) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][BCOMP] & 0x3ff) << 22)
- | ((rgba[i][GCOMP] & 0x3ff) << 12)
- | ((rgba[i][RCOMP] & 0x3ff) << 2)
- | ((rgba[i][ACOMP] & 0x3) );
- }
- }
- else {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
- | ((rgba[i][BCOMP] & 0x3ff) << 12)
- | ((rgba[i][GCOMP] & 0x3ff) << 2)
- | ((rgba[i][RCOMP] & 0x3) );
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
- | ((rgba[i][BCOMP] & 0x3ff) << 12)
- | ((rgba[i][GCOMP] & 0x3ff) << 2)
- | ((rgba[i][RCOMP] & 0x3) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][ACOMP] & 0x3ff) << 22)
- | ((rgba[i][RCOMP] & 0x3ff) << 12)
- | ((rgba[i][GCOMP] & 0x3ff) << 2)
- | ((rgba[i][BCOMP] & 0x3) );
- }
- }
- else {
- GLuint *dst = (GLuint *) destination;
- GLuint i;
- ASSERT(format == GL_ABGR_EXT);
- for (i = 0; i < n; i++) {
- dst[i] = ((rgba[i][RCOMP] & 0x3ff) << 22)
- | ((rgba[i][GCOMP] & 0x3ff) << 12)
- | ((rgba[i][BCOMP] & 0x3ff) << 2)
- | ((rgba[i][ACOMP] & 0x3) );
- }
- }
- break;
- default:
- _mesa_problem(ctx, "Bad type in pack_histogram");
- }
-
-#undef PACK_MACRO
-}
-
-
-/*
- * Given an internalFormat token passed to glHistogram or glMinMax,
- * return the corresponding base format.
- * Return -1 if invalid token.
- */
-static GLint
-base_histogram_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_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 */
- }
-}
-