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mesa: Add support for unpacking 32-bit integer formats to int spans.

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This is the inverse operation to _mesa_pack_rgba_span_int.  The 16-bit
code isn't done because of lack of testing and not being sure how sign
extension/clamping should be handled between, say, 16-bit int and
32-bit int or uint.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt
2011-11-03 17:08:16 -07:00
parent 84277cb7d3
commit e34c9edcda
2 changed files with 128 additions and 0 deletions
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src/mesa/main/format_unpack.c
+120
View File
@@ -1258,7 +1258,127 @@ _mesa_unpack_rgba_row(gl_format format, GLuint n,
}
}
static void
unpack_int_rgba_RGBA_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
memcpy(dst, src, n * 4 * sizeof(GLuint));
}
static void
unpack_int_rgba_RGB_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = src[i * 3 + 0];
dst[i][1] = src[i * 3 + 1];
dst[i][2] = src[i * 3 + 2];
dst[i][3] = 1;
}
}
static void
unpack_int_rgba_RG_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = src[i * 2 + 0];
dst[i][1] = src[i * 2 + 1];
dst[i][2] = 0;
dst[i][3] = 1;
}
}
static void
unpack_int_rgba_R_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = src[i];
dst[i][1] = 0;
dst[i][2] = 0;
dst[i][3] = 1;
}
}
static void
unpack_int_rgba_LUMINANCE_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = dst[i][1] = dst[i][2] = src[i];
dst[i][3] = 1;
}
}
static void
unpack_int_rgba_LUMINANCE_ALPHA_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = dst[i][1] = dst[i][2] = src[i * 2 + 0];
dst[i][3] = src[i * 2 + 1];
}
}
static void
unpack_int_rgba_INTENSITY_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
{
unsigned int i;
for (i = 0; i < n; i++) {
dst[i][0] = dst[i][1] = dst[i][2] = dst[i][3] = src[i];
}
}
void
_mesa_unpack_int_rgba_row(gl_format format, GLuint n,
const void *src, GLuint dst[][4])
{
switch (format) {
/* Since there won't be any sign extension happening, there's no need to
* make separate paths for 32-bit-to-32-bit integer unpack.
*/
case MESA_FORMAT_RGBA_UINT32:
case MESA_FORMAT_RGBA_INT32:
unpack_int_rgba_RGBA_UINT32(src, dst, n);
break;
case MESA_FORMAT_RGB_UINT32:
case MESA_FORMAT_RGB_INT32:
unpack_int_rgba_RGB_UINT32(src, dst, n);
break;
case MESA_FORMAT_RG_UINT32:
case MESA_FORMAT_RG_INT32:
unpack_int_rgba_RG_UINT32(src, dst, n);
break;
case MESA_FORMAT_R_UINT32:
case MESA_FORMAT_R_INT32:
unpack_int_rgba_R_UINT32(src, dst, n);
break;
case MESA_FORMAT_LUMINANCE_UINT32:
case MESA_FORMAT_LUMINANCE_INT32:
unpack_int_rgba_LUMINANCE_UINT32(src, dst, n);
break;
case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
unpack_int_rgba_LUMINANCE_ALPHA_UINT32(src, dst, n);
break;
case MESA_FORMAT_INTENSITY_UINT32:
case MESA_FORMAT_INTENSITY_INT32:
unpack_int_rgba_INTENSITY_UINT32(src, dst, n);
break;
default:
_mesa_problem(NULL, "%s: bad format %s", __FUNCTION__,
_mesa_get_format_name(format));
return;
}
}
/**
* Unpack a 2D rect of pixels returning float RGBA colors.
src/mesa/main/format_unpack.h
+8
View File
@@ -29,12 +29,20 @@ _mesa_unpack_rgba_row(gl_format format, GLuint n,
const void *src, GLfloat dst[][4]);
void
_mesa_unpack_int_rgba_row(gl_format format, GLuint n,
const void *src, GLuint dst[][4]);
extern void
_mesa_unpack_rgba_block(gl_format format,
const void *src, GLint srcRowStride,
GLfloat dst[][4], GLint dstRowStride,
GLuint x, GLuint y, GLuint width, GLuint height);
extern void
_mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
const void *src, GLuint dst[][4]);
extern void
_mesa_unpack_float_z_row(gl_format format, GLuint n,