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remove unused _swrast_read_depth_span()

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This commit is contained in:
Brian Paul 2005-09-16 21:10:27 +00:00
parent f2ea634c0c
commit 82e314252f
1 changed files with 31 additions and 44 deletions
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75
src/mesa/swrast/s_depth.c
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@ -1190,22 +1190,29 @@ _swrast_depth_bounds_test( GLcontext *ctx, struct sw_span *span )
/**
* Read a span of depth values from the depth buffer.
* This function does clipping before calling the device driver function.
*
* XXXX this is no longer a swrast function!!!
*
* Read a span of depth values from the given depth renderbuffer, returning
* the values as GLfloats.
* This function does clipping to prevent reading outside the depth buffer's
* bounds. Though the clipping is redundant when we're called from
* _swrast_ReadPixels.
*/
void
_swrast_read_depth_span( GLcontext *ctx, struct gl_renderbuffer *rb,
GLint n, GLint x, GLint y, GLuint depth[] )
_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb,
GLint n, GLint x, GLint y, GLfloat depth[] )
{
const GLfloat scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
if (!rb) {
/* really only doing this to prevent FP exceptions later */
_mesa_bzero(depth, n * sizeof(GLfloat));
}
ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT);
if (y < 0 || y >= (GLint) rb->Height ||
x + (GLint) n <= 0 || x >= (GLint) rb->Width) {
/* span is completely outside framebuffer */
GLint i;
for (i = 0; i < n; i++)
depth[i] = 0;
_mesa_bzero(depth, n * sizeof(GLfloat));
return;
}
@ -1213,7 +1220,7 @@ _swrast_read_depth_span( GLcontext *ctx, struct gl_renderbuffer *rb,
GLint dx = -x;
GLint i;
for (i = 0; i < dx; i++)
depth[i] = 0;
depth[i] = 0.0;
x = 0;
n -= dx;
depth += dx;
@ -1222,57 +1229,37 @@ _swrast_read_depth_span( GLcontext *ctx, struct gl_renderbuffer *rb,
GLint dx = x + n - (GLint) rb->Width;
GLint i;
for (i = 0; i < dx; i++)
depth[n - i - 1] = 0;
depth[n - i - 1] = 0.0;
n -= dx;
}
if (n <= 0) {
return;
}
/* we'll always return 32-bit values to our caller */
if (!rb) {
_mesa_bzero(depth, n * sizeof(GLuint));
if (rb->DataType == GL_UNSIGNED_INT) {
GLuint temp[MAX_WIDTH];
GLint i;
rb->GetRow(ctx, rb, n, x, y, temp);
for (i = 0; i < n; i++) {
depth[i] = temp[i] * scale;
}
}
else if (rb->DataType == GL_UNSIGNED_INT) {
rb->GetRow(ctx, rb, n, x, y, depth);
}
else {
else if (rb->DataType == GL_UNSIGNED_SHORT) {
GLushort temp[MAX_WIDTH];
GLuint i;
ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
GLint i;
rb->GetRow(ctx, rb, n, x, y, temp);
for (i = 0; i < n; i++) {
depth[i] = temp[i];
}
}
}
/**
* Return a span of depth values from the depth buffer as floats in [0,1].
* Input: n - how many pixels
* x,y - location of first pixel
* Output: depth - the array of depth values
*/
void
_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb,
GLint n, GLint x, GLint y, GLfloat depth[] )
{
const GLfloat scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
GLuint temp[MAX_WIDTH];
GLint i;
assert(n <= MAX_WIDTH);
_swrast_read_depth_span(ctx, rb, n, x, y, temp);
for (i = 0; i < n; i++) {
depth[i] = temp[i] * scale;
else {
_mesa_problem(ctx, "Invalid depth renderbuffer internal format");
}
}
/**
* Clear the depth buffer.
* Clear the given z/depth renderbuffer.
*/
void
_swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb )