📄 image.c
字号:
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
}
break;
default:
_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
if (dstPacking->SwapBytes) {
_mesa_swap4( (GLuint *) dst, n * comps );
}
}
break;
case GL_FLOAT:
{
GLfloat *dst = (GLfloat *) dstAddr;
switch (dstFormat) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = rgba[i][RCOMP];
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = rgba[i][GCOMP];
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = rgba[i][BCOMP];
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = rgba[i][ACOMP];
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = luminance[i];
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = luminance[i];
dst[i*2+1] = rgba[i][ACOMP];
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = rgba[i][RCOMP];
dst[i*3+1] = rgba[i][GCOMP];
dst[i*3+2] = rgba[i][BCOMP];
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = rgba[i][RCOMP];
dst[i*4+1] = rgba[i][GCOMP];
dst[i*4+2] = rgba[i][BCOMP];
dst[i*4+3] = rgba[i][ACOMP];
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = rgba[i][BCOMP];
dst[i*3+1] = rgba[i][GCOMP];
dst[i*3+2] = rgba[i][RCOMP];
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = rgba[i][BCOMP];
dst[i*4+1] = rgba[i][GCOMP];
dst[i*4+2] = rgba[i][RCOMP];
dst[i*4+3] = rgba[i][ACOMP];
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = rgba[i][ACOMP];
dst[i*4+1] = rgba[i][BCOMP];
dst[i*4+2] = rgba[i][GCOMP];
dst[i*4+3] = rgba[i][RCOMP];
}
break;
default:
_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
if (dstPacking->SwapBytes) {
_mesa_swap4( (GLuint *) dst, n * comps );
}
}
break;
case GL_HALF_FLOAT_ARB:
{
GLhalfARB *dst = (GLhalfARB *) dstAddr;
switch (dstFormat) {
case GL_RED:
for (i=0;i<n;i++)
dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
dst[i] = _mesa_float_to_half(luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
dst[i*2+0] = _mesa_float_to_half(luminance[i]);
dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
}
break;
default:
_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
if (dstPacking->SwapBytes) {
_mesa_swap2( (GLushort *) dst, n * comps );
}
}
break;
case GL_UNSIGNED_BYTE_3_3_2:
if (dstFormat == GL_RGB) {
GLubyte *dst = (GLubyte *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5)
| (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2)
| (((GLint) (rgba[i][BCOMP] * 3.0F)) );
}
}
break;
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (dstFormat == GL_RGB) {
GLubyte *dst = (GLubyte *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) )
| (((GLint) (rgba[i][GCOMP] * 7.0F)) << 3)
| (((GLint) (rgba[i][BCOMP] * 3.0F)) << 5);
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5:
if (dstFormat == GL_RGB) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
| (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
| (((GLint) (rgba[i][BCOMP] * 31.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (dstFormat == GL_RGB) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
| (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11);
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
if (dstFormat == GL_RGBA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12)
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][ACOMP] * 15.0F)) );
}
}
else if (dstFormat == GL_BGRA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) << 12)
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][ACOMP] * 15.0F)) );
}
}
else if (dstFormat == GL_ABGR_EXT) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 12)
| (((GLint) (rgba[i][RCOMP] * 15.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
if (dstFormat == GL_RGBA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) )
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
}
}
else if (dstFormat == GL_BGRA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) )
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
}
}
else if (dstFormat == GL_ABGR_EXT) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) )
| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12);
}
}
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
if (dstFormat == GL_RGBA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 1)
| (((GLint) (rgba[i][ACOMP] * 1.0F)) );
}
}
else if (dstFormat == GL_BGRA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11)
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
| (((GLint) (rgba[i][RCOMP] * 31.0F)) << 1)
| (((GLint) (rgba[i][ACOMP] * 1.0F)) );
}
}
else if (dstFormat == GL_ABGR_EXT) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) << 11)
| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 6)
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 1)
| (((GLint) (rgba[i][RCOMP] * 1.0F)) );
}
}
break;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (dstFormat == GL_RGBA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 10)
| (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
}
}
else if (dstFormat == GL_BGRA) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) )
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
| (((GLint) (rgba[i][RCOMP] * 31.0F)) << 10)
| (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
}
}
else if (dstFormat == GL_ABGR_EXT) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) )
| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 5)
| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 10)
| (((GLint) (rgba[i][RCOMP] * 1.0F)) << 15);
}
}
break;
case GL_UNSIGNED_INT_8_8_8_8:
if (dstFormat == GL_RGBA) {
GLuint *dst = (GLuint *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24)
| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
| (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8)
| (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
}
}
else if (dstFormat == GL_BGRA) {
GLuint *dst = (GLuint *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 24)
| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
| (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 8)
| (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
}
}
else if (dstFormat == GL_ABGR_EXT) {
GLuint *dst = (GLuint *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) << ⌨️ 快捷键说明
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