ReactOS Development > Doxygen
Definition at line 39 of file histogram.c. Referenced by _mesa_GetHistogram(). {
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
}
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Generated on Sun May 27 2012 04:58:07 for ReactOS by
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