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added _mesa_pack_depth_stencil_span()

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This commit is contained in:
Brian Paul 2005-10-01 16:02:38 +00:00
parent 3d61c2e778
commit 31340f6645
2 changed files with 54 additions and 0 deletions
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47
src/mesa/main/image.c
View file

@ -4084,6 +4084,53 @@ _mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
}
/**
* Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
*/
void
_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
const GLfloat *depthVals,
const GLstencil *stencilVals,
const struct gl_pixelstore_attrib *dstPacking)
{
GLfloat depthCopy[MAX_WIDTH];
GLstencil stencilCopy[MAX_WIDTH];
GLuint i;
ASSERT(n <= MAX_WIDTH);
if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
_mesa_memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
_mesa_scale_and_bias_depth(ctx, n, depthCopy);
depthVals = depthCopy;
}
if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
_mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
_mesa_shift_and_offset_stencil(ctx, n, stencilCopy);
stencilVals = stencilCopy;
}
if (ctx->Pixel.MapStencilFlag) {
if (stencilVals != stencilCopy)
_mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
_mesa_map_stencil(ctx, n, stencilCopy);
stencilVals = stencilCopy;
}
for (i = 0; i < n; i++) {
GLuint z = (GLuint) (depthVals[i] * 0xffffff);
dest[i] = (z << 8) | (stencilVals[i] & 0xff);
}
if (dstPacking->SwapBytes) {
_mesa_swap4(dest, n);
}
}
/**
* Unpack image data. Apply byte swapping, byte flipping (bitmap).
* Return all image data in a contiguous block. This is used when we

7
src/mesa/main/image.h
View file

@ -189,6 +189,13 @@ _mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
const struct gl_pixelstore_attrib *dstPacking );
extern void
_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
const GLfloat *depthVals,
const GLstencil *stencilVals,
const struct gl_pixelstore_attrib *dstPacking);
extern void *
_mesa_unpack_image( GLuint dimensions,
GLsizei width, GLsizei height, GLsizei depth,