fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-01-25 01:30:30 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

mesa: add packing for int/uint

Browse source 
This just adds a simple packing for GL_UNSIGNED_INT/GL_INT destination formats.
This is enough for at least the gallium drivers to pack both unsigned and signed types for read pixels.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2011-09-19 15:06:13 +01:00
parent 61285c6cfa
commit 8f9edbad6f
2 changed files with 68 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

63
src/mesa/main/pack.c
View file

@ -467,6 +467,69 @@ get_type_min_max(GLenum type, GLfloat *min, GLfloat *max)
}
}
/*
* integer packing , no transfer operations only packs
* to dst of GL_UNSIGNED_INT or GL_INT
*/
void
_mesa_pack_rgba_span_int(struct gl_context *ctx, GLuint n, GLuint rgba[][4],
GLenum dstFormat, GLenum dstType,
GLvoid *dstAddr)
{
int i;
switch(dstType) {
case GL_UNSIGNED_INT: {
GLuint *dst = (GLuint *) dstAddr;
switch (dstFormat) {
case GL_RED_INTEGER_EXT:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_INTEGER_EXT:
case GL_RGB_INTEGER_EXT:
case GL_RGBA_INTEGER_EXT:
case GL_BGR_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = (GLuint) rgba[i][RCOMP];
dst[i*4+1] = (GLuint) rgba[i][GCOMP];
dst[i*4+2] = (GLuint) rgba[i][BCOMP];
dst[i*4+3] = (GLuint) rgba[i][ACOMP];
}
break;
}
}
break;
case GL_INT: {
GLint *dst = (GLint *) dstAddr;
switch (dstFormat) {
case GL_RED_INTEGER_EXT:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_INTEGER_EXT:
case GL_RGB_INTEGER_EXT:
case GL_RGBA_INTEGER_EXT:
case GL_BGR_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = (GLint) rgba[i][RCOMP];
dst[i*4+1] = (GLint) rgba[i][GCOMP];
dst[i*4+2] = (GLint) rgba[i][BCOMP];
dst[i*4+3] = (GLint) rgba[i][ACOMP];
}
break;
}
}
break;
default:
assert(0);
return;
}
}
/**

5
src/mesa/main/pack.h
View file

@ -144,4 +144,9 @@ _mesa_unpack_image(GLuint dimensions,
const struct gl_pixelstore_attrib *unpack);
void
_mesa_pack_rgba_span_int(struct gl_context *ctx, GLuint n, GLuint rgba[][4],
GLenum dstFormat, GLenum dstType,
GLvoid *dstAddr);
#endif