summaryrefslogtreecommitdiff
path: root/src/mesa/swrast/s_readpix.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/swrast/s_readpix.c')
-rw-r--r--src/mesa/swrast/s_readpix.c372
1 files changed, 48 insertions, 324 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 2dc739a103..8514b5a1f9 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -1,4 +1,4 @@
-/* $Id: s_readpix.c,v 1.6 2001/01/23 23:39:37 brianp Exp $ */
+/* $Id: s_readpix.c,v 1.7 2001/02/16 23:29:14 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -46,13 +46,14 @@
/*
* Read a block of color index pixels.
*/
-static void read_index_pixels( GLcontext *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
+static void
+read_index_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
{
- GLint i, j, readWidth;
+ GLint i, readWidth;
/* error checking */
if (ctx->Visual.rgbMode) {
@@ -61,118 +62,39 @@ static void read_index_pixels( GLcontext *ctx,
}
ASSERT(ctx->Driver.SetReadBuffer);
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer, ctx->Pixel.DriverReadBuffer);
+ (*ctx->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer);
readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
/* process image row by row */
- for (j=0;j<height;j++,y++) {
+ for (i = 0; i < height; i++) {
GLuint index[MAX_WIDTH];
GLvoid *dest;
- (*ctx->Driver.ReadCI32Span)( ctx, readWidth, x, y, index );
-
- if (ctx->Pixel.IndexShift!=0 || ctx->Pixel.IndexOffset!=0) {
- _mesa_shift_and_offset_ci( ctx, readWidth, index);
- }
+ (*ctx->Driver.ReadCI32Span)(ctx, readWidth, x, y + i, index);
- if (ctx->Pixel.MapColorFlag) {
- _mesa_map_ci(ctx, readWidth, index);
- }
+ dest = _mesa_image_address(packing, pixels, width, height,
+ GL_COLOR_INDEX, type, 0, i, 0);
- dest = _mesa_image_address(packing, pixels,
- width, height, GL_COLOR_INDEX, type, 0, j, 0);
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- for (i=0;i<readWidth;i++) {
- *dst++ = (GLubyte) index[i];
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLbyte) index[i];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLushort) index[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLshort) index[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLuint) index[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLint) index[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLfloat) index[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" );
- j = height + 1; /* exit loop */
- }
+ _mesa_pack_index_span(ctx, readWidth, type, dest, index,
+ &ctx->Pack, ctx->_ImageTransferState);
}
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer, ctx->Color.DriverDrawBuffer);
+ (*ctx->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer,
+ ctx->Color.DriverDrawBuffer);
}
-static void read_depth_pixels( GLcontext *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
+static void
+read_depth_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
{
- GLint i, j, readWidth;
+ GLint readWidth;
GLboolean bias_or_scale;
/* Error checking */
@@ -200,6 +122,7 @@ static void read_depth_pixels( GLcontext *ctx,
if (type==GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16
&& !bias_or_scale && !packing->SwapBytes) {
/* Special case: directly read 16-bit unsigned depth values. */
+ GLint j;
for (j=0;j<height;j++,y++) {
GLdepth depth[MAX_WIDTH];
GLushort *dst = (GLushort*) _mesa_image_address( packing, pixels,
@@ -213,6 +136,7 @@ static void read_depth_pixels( GLcontext *ctx,
else if (type==GL_UNSIGNED_INT && ctx->Visual.depthBits == 32
&& !bias_or_scale && !packing->SwapBytes) {
/* Special case: directly read 32-bit unsigned depth values. */
+ GLint j;
for (j=0;j<height;j++,y++) {
GLdepth *dst = (GLdepth *) _mesa_image_address( packing, pixels,
width, height, GL_DEPTH_COMPONENT, type, 0, j, 0 );
@@ -221,112 +145,31 @@ static void read_depth_pixels( GLcontext *ctx,
}
else {
/* General case (slower) */
+ GLint j;
for (j=0;j<height;j++,y++) {
GLfloat depth[MAX_WIDTH];
GLvoid *dest;
_mesa_read_depth_span_float(ctx, readWidth, x, y, depth);
- if (bias_or_scale) {
- for (i=0;i<readWidth;i++) {
- GLfloat d;
- d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
- depth[i] = CLAMP( d, 0.0F, 1.0F );
- }
- }
+ dest = _mesa_image_address(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, 0, j, 0);
- dest = _mesa_image_address(packing, pixels,
- width, height, GL_DEPTH_COMPONENT, type, 0, j, 0);
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_UBYTE( depth[i] );
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_BYTE( depth[i] );
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_USHORT( depth[i] );
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_SHORT( depth[i] );
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_UINT( depth[i] );
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = FLOAT_TO_INT( depth[i] );
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = depth[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" );
- }
+ _mesa_pack_depth_span(ctx, readWidth, dest, type, depth, &ctx->Pack);
}
}
}
-static void read_stencil_pixels( GLcontext *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
+static void
+read_stencil_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
{
- GLboolean shift_or_offset;
- GLint i, j, readWidth;
+ GLint j, readWidth;
if (type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
@@ -348,137 +191,17 @@ static void read_stencil_pixels( GLcontext *ctx,
return;
}
- shift_or_offset = ctx->Pixel.IndexShift!=0 || ctx->Pixel.IndexOffset!=0;
-
/* process image row by row */
for (j=0;j<height;j++,y++) {
GLvoid *dest;
GLstencil stencil[MAX_WIDTH];
- _mesa_read_stencil_span( ctx, readWidth, x, y, stencil );
+ _mesa_read_stencil_span(ctx, readWidth, x, y, stencil);
- if (shift_or_offset) {
- _mesa_shift_and_offset_stencil( ctx, readWidth, stencil );
- }
-
- if (ctx->Pixel.MapStencilFlag) {
- _mesa_map_stencil( ctx, readWidth, stencil );
- }
+ dest = _mesa_image_address(packing, pixels, width, height,
+ GL_STENCIL_INDEX, type, 0, j, 0);
- dest = _mesa_image_address( packing, pixels,
- width, height, GL_STENCIL_INDEX, type, 0, j, 0 );
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- if (sizeof(GLstencil) == 8) {
- MEMCPY( dest, stencil, readWidth );
- }
- else {
- GLubyte *dst = (GLubyte *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLubyte) stencil[i];
- }
- }
- break;
- case GL_BYTE:
- if (sizeof(GLstencil) == 8) {
- MEMCPY( dest, stencil, readWidth );
- }
- else {
- GLbyte *dst = (GLbyte *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLbyte) stencil[i];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLushort) stencil[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLshort) stencil[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, readWidth );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLuint) stencil[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) dest;
- for (i=0;i<readWidth;i++) {
- *dst++ = (GLint) stencil[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) dest;
- for (i=0;i<readWidth;i++) {
- dst[i] = (GLfloat) stencil[i];
- }
- if (packing->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, readWidth );
- }
- }
- break;
- case GL_BITMAP:
- if (packing->LsbFirst) {
- GLubyte *dst = (GLubyte*) dest;
- GLint shift = 0;
- for (i = 0; i < readWidth; i++) {
- if (shift == 0)
- *dst = 0;
- *dst |= ((stencil != 0) << shift);
- shift++;
- if (shift == 8) {
- shift = 0;
- dst++;
- }
- }
- }
- else {
- GLubyte *dst = (GLubyte*) dest;
- GLint shift = 7;
- for (i = 0; i < readWidth; i++) {
- if (shift == 7)
- *dst = 0;
- *dst |= ((stencil != 0) << shift);
- shift--;
- if (shift < 0) {
- shift = 7;
- dst++;
- }
- }
- }
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" );
- }
+ _mesa_pack_stencil_span(ctx, readWidth, type, dest, stencil, &ctx->Pack);
}
}
@@ -582,11 +305,12 @@ read_fast_rgba_pixels( GLcontext *ctx,
/*
* Read R, G, B, A, RGB, L, or LA pixels.
*/
-static void read_rgba_pixels( GLcontext *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
+static void
+read_rgba_pixels( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
{
GLint readWidth;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 14:24:53 +0000