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st/mesa: add readpixel integer support

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This adds support for readpixels integer paths, it deals with the signed/unsigned crossovers.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2011-09-19 15:06:23 +01:00
parent 3213d55d99
commit a66a2359d7
1 changed files with 38 additions and 2 deletions
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40
src/mesa/state_tracker/st_cb_readpixels.c
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@ -387,6 +387,8 @@ st_readpixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei h
GLsizei i, j;
GLint yStep, dfStride;
GLfloat *df;
GLuint *dui;
GLint *di;
struct st_renderbuffer *strb;
struct gl_pixelstore_attrib clippedPacking = *pack;
struct pipe_transfer *trans;
@ -454,10 +456,13 @@ st_readpixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei h
}
else {
/* write tile(row) into temp row buffer */
df = (GLfloat *) temp;
df = (GLfloat *)temp;
dfStride = 0;
}
dui = (GLuint *)df;
di = (GLint *)df;
if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
/* convert GL Y to Gallium Y */
y = strb->Base.Height - y - height;
@ -611,7 +616,38 @@ st_readpixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei h
dst += dstStride;
}
}
else {
else if (util_format_is_pure_sint(pformat)) {
for (i = 0; i < height; i++) {
if (type == GL_UNSIGNED_INT)
pipe_get_tile_ui_format(pipe, trans, 0, y, width, 1,
pformat, dui);
else
pipe_get_tile_i_format(pipe, trans, 0, y, width, 1,
pformat, di);
y += yStep;
if (!dfStride) {
_mesa_pack_rgba_span_int(ctx, width, (GLuint (*)[4])temp,
format, type, dst);
dst += dstStride;
}
}
} else if (util_format_is_pure_uint(pformat)) {
for (i = 0; i < height; i++) {
if (type == GL_UNSIGNED_INT)
pipe_get_tile_ui_format(pipe, trans, 0, y, width, 1,
pformat, dui);
else
pipe_get_tile_i_format(pipe, trans, 0, y, width, 1,
pformat, di);
y += yStep;
df += dfStride;
if (!dfStride) {
_mesa_pack_rgba_span_int(ctx, width, (GLuint (*)[4])temp,
format, type, dst);
dst += dstStride;
}
}
} else {
/* RGBA format */
/* Do a row at a time to flip image data vertically */
for (i = 0; i < height; i++) {