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path: root/src/mesa/swrast/s_readpix.c
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Diffstat (limited to 'src/mesa/swrast/s_readpix.c')
-rw-r--r--src/mesa/swrast/s_readpix.c126
1 files changed, 63 insertions, 63 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 61ad2c252ea..07e24d6caeb 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -52,10 +52,7 @@ read_index_pixels( GLcontext *ctx,
const struct gl_pixelstore_attrib *packing )
{
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- /*
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- */
- GLint i, readWidth;
+ GLint i;
/* error checking */
if (ctx->Visual.rgbMode) {
@@ -74,20 +71,24 @@ read_index_pixels( GLcontext *ctx,
return;
}
- /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
- readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+ if (!rb) {
+ return; /* no readbuffer OK */
+ }
+
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
/* process image row by row */
for (i = 0; i < height; i++) {
GLuint index[MAX_WIDTH];
GLvoid *dest;
ASSERT(rb->DataType == GL_UNSIGNED_INT);
- rb->GetRow(ctx, rb, readWidth, x, y + i, index);
+ rb->GetRow(ctx, rb, width, x, y + i, index);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_COLOR_INDEX, type, i, 0);
- _mesa_pack_index_span(ctx, readWidth, type, dest, index,
+ _mesa_pack_index_span(ctx, width, type, dest, index,
&ctx->Pack, ctx->_ImageTransferState);
}
}
@@ -106,13 +107,15 @@ read_depth_pixels( GLcontext *ctx,
{
struct gl_renderbuffer *rb
= ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- GLint readWidth;
GLboolean bias_or_scale;
- if (!rb) {
- /* no readbuffer - OK */
- return;
- }
+ /* clipping should have been done already */
+ ASSERT(x >= 0);
+ ASSERT(y >= 0);
+ ASSERT(x + width <= rb->Width);
+ ASSERT(y + height <= rb->Height);
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
/* Error checking */
if (ctx->Visual.depthBits <= 0) {
@@ -132,48 +135,49 @@ read_depth_pixels( GLcontext *ctx,
return;
}
- /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
- readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+ if (!rb) {
+ return; /* no readbuffer OK */
+ }
- bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
+ bias_or_scale = ctx->Pixel.DepthBias != 0.0 || ctx->Pixel.DepthScale != 1.0;
- if (type==GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16
+ 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_address2d(packing, pixels,
- width, height, GL_DEPTH_COMPONENT, type, j, 0);
- GLint i;
- _swrast_read_depth_span(ctx, rb, width, x, y, depth);
- for (i = 0; i < width; i++)
- dst[i] = depth[i];
+ ASSERT(rb->InternalFormat == GL_DEPTH_COMPONENT16);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest =_mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
}
}
- else if (type==GL_UNSIGNED_INT && ctx->Visual.depthBits == 32
+ 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_address2d(packing, pixels,
- width, height, GL_DEPTH_COMPONENT, type, j, 0);
- _swrast_read_depth_span(ctx, rb, width, x, y, dst);
+ ASSERT(rb->InternalFormat == GL_DEPTH_COMPONENT32);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
}
}
else {
/* General case (slower) */
GLint j;
- for (j=0;j<height;j++,y++) {
+ for (j = 0; j < height; j++, y++) {
GLfloat depth[MAX_WIDTH];
GLvoid *dest;
- _swrast_read_depth_span_float(ctx, rb, readWidth, x, y, depth);
+ _swrast_read_depth_span_float(ctx, rb, width, x, y, depth);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, j, 0);
- _mesa_pack_depth_span(ctx, readWidth, (GLdepth *) dest, type,
+ _mesa_pack_depth_span(ctx, width, (GLdepth *) dest, type,
depth, packing);
}
}
@@ -192,7 +196,7 @@ read_stencil_pixels( GLcontext *ctx,
{
struct gl_renderbuffer *rb
= ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
- GLint j, readWidth;
+ GLint j;
if (!rb) {
/* no readbuffer - OK */
@@ -217,20 +221,20 @@ read_stencil_pixels( GLcontext *ctx,
return;
}
- /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
- readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
/* process image row by row */
for (j=0;j<height;j++,y++) {
GLvoid *dest;
GLstencil stencil[MAX_WIDTH];
- _swrast_read_stencil_span(ctx, rb, readWidth, x, y, stencil);
+ _swrast_read_stencil_span(ctx, rb, width, x, y, stencil);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_STENCIL_INDEX, type, j, 0);
- _mesa_pack_stencil_span(ctx, readWidth, type, dest, stencil, packing);
+ _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
}
}
@@ -250,6 +254,7 @@ read_fast_rgba_pixels( GLcontext *ctx,
const struct gl_pixelstore_attrib *packing )
{
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+
/* can't do scale, bias, mapping, etc */
if (ctx->_ImageTransferState)
return GL_FALSE;
@@ -324,10 +329,6 @@ read_rgba_pixels( GLcontext *ctx,
const struct gl_pixelstore_attrib *packing )
{
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- /*
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- */
- GLint readWidth;
if (!rb) {
/* No readbuffer is OK with GL_EXT_framebuffer_object */
@@ -380,9 +381,8 @@ read_rgba_pixels( GLcontext *ctx,
return; /* done! */
}
- /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
- readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
-
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
const GLuint transferOps = ctx->_ImageTransferState;
@@ -406,18 +406,18 @@ read_rgba_pixels( GLcontext *ctx,
for (row = 0; row < height; row++, y++) {
GLchan rgba[MAX_WIDTH][4];
if (ctx->Visual.rgbMode) {
- _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, rb, width, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
ASSERT(rb->DataType == GL_UNSIGNED_INT);
- rb->GetRow(ctx, rb, readWidth, x, y, index);
+ rb->GetRow(ctx, rb, width, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) {
- _mesa_map_ci(ctx, readWidth, index);
+ _mesa_map_ci(ctx, width, index);
}
- _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba);
+ _mesa_map_ci_to_rgba_chan(ctx, width, index, rgba);
}
- _mesa_pack_rgba_span_chan(ctx, readWidth, (const GLchan (*)[4]) rgba,
+ _mesa_pack_rgba_span_chan(ctx, width, (const GLchan (*)[4]) rgba,
GL_RGBA, GL_FLOAT, dest, &ctx->DefaultPacking,
transferOps & IMAGE_PRE_CONVOLUTION_BITS);
dest += width * 4;
@@ -425,11 +425,11 @@ read_rgba_pixels( GLcontext *ctx,
/* do convolution */
if (ctx->Pixel.Convolution2DEnabled) {
- _mesa_convolve_2d_image(ctx, &readWidth, &height, tmpImage, convImage);
+ _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
}
else {
ASSERT(ctx->Pixel.Separable2DEnabled);
- _mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage);
+ _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
}
_mesa_free(tmpImage);
@@ -437,13 +437,13 @@ read_rgba_pixels( GLcontext *ctx,
src = convImage;
for (row = 0; row < height; row++) {
GLvoid *dest;
- dest = _mesa_image_address2d(packing, pixels, readWidth, height,
+ dest = _mesa_image_address2d(packing, pixels, width, height,
format, type, row, 0);
- _mesa_pack_rgba_span_float(ctx, readWidth,
+ _mesa_pack_rgba_span_float(ctx, width,
(const GLfloat (*)[4]) src,
format, type, dest, packing,
transferOps & IMAGE_POST_CONVOLUTION_BITS);
- src += readWidth * 4;
+ src += width * 4;
}
}
else {
@@ -453,16 +453,16 @@ read_rgba_pixels( GLcontext *ctx,
GLchan rgba[MAX_WIDTH][4];
GLvoid *dst;
if (ctx->Visual.rgbMode) {
- _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, rb, width, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
ASSERT(rb->DataType == GL_UNSIGNED_INT);
- rb->GetRow(ctx, rb, readWidth, x, y, index);
+ rb->GetRow(ctx, rb, width, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
- _mesa_map_ci(ctx, readWidth, index);
+ _mesa_map_ci(ctx, width, index);
}
- _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba);
+ _mesa_map_ci_to_rgba_chan(ctx, width, index, rgba);
}
dst = _mesa_image_address2d(packing, pixels, width, height,
format, type, row, 0);
@@ -474,16 +474,16 @@ read_rgba_pixels( GLcontext *ctx,
* buffers, for example.
*/
GLfloat rgbaf[MAX_WIDTH][4];
- _mesa_chan_to_float_span(ctx, readWidth,
+ _mesa_chan_to_float_span(ctx, width,
(CONST GLchan (*)[4]) rgba, rgbaf);
- _mesa_pack_rgba_span_float(ctx, readWidth,
+ _mesa_pack_rgba_span_float(ctx, width,
(CONST GLfloat (*)[4]) rgbaf,
format, type, dst, packing,
ctx->_ImageTransferState);
}
else {
/* GLubytes are fine */
- _mesa_pack_rgba_span_chan(ctx, readWidth, (CONST GLchan (*)[4]) rgba,
+ _mesa_pack_rgba_span_chan(ctx, width, (CONST GLchan (*)[4]) rgba,
format, type, dst, packing,
ctx->_ImageTransferState);
}
@@ -546,7 +546,7 @@ _swrast_ReadPixels( GLcontext *ctx,
&clippedPacking);
break;
case GL_STENCIL_INDEX:
- read_stencil_pixels(ctx, x,y, width,height, type, pixels,
+ read_stencil_pixels(ctx, x, y, width, height, type, pixels,
&clippedPacking);
break;
case GL_DEPTH_COMPONENT:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 23:15:47 +0000