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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.c91
1 files changed, 61 insertions, 30 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 7d8112fb9b..559fed5da6 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -34,7 +34,6 @@
#include "imports.h"
#include "pixel.h"
-#include "s_alphabuf.h"
#include "s_context.h"
#include "s_depth.h"
#include "s_span.h"
@@ -52,7 +51,10 @@ read_index_pixels( GLcontext *ctx,
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ /*
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ */
GLint i, readWidth;
/* error checking */
@@ -81,8 +83,8 @@ read_index_pixels( GLcontext *ctx,
for (i = 0; i < height; i++) {
GLuint index[MAX_WIDTH];
GLvoid *dest;
-
- (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y + i, index);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y + i, index);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_COLOR_INDEX, type, i, 0);
@@ -106,9 +108,16 @@ read_depth_pixels( GLcontext *ctx,
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ struct gl_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
GLint readWidth;
GLboolean bias_or_scale;
+ if (!rb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
/* Error checking */
if (ctx->Visual.depthBits <= 0) {
/* No depth buffer */
@@ -116,9 +125,6 @@ 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 (type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
type != GL_SHORT &&
@@ -130,6 +136,9 @@ 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;
+
bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
if (type==GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16
@@ -141,7 +150,7 @@ read_depth_pixels( GLcontext *ctx,
GLushort *dst = (GLushort*) _mesa_image_address2d(packing, pixels,
width, height, GL_DEPTH_COMPONENT, type, j, 0);
GLint i;
- _swrast_read_depth_span(ctx, width, x, y, depth);
+ _swrast_read_depth_span(ctx, rb, width, x, y, depth);
for (i = 0; i < width; i++)
dst[i] = depth[i];
}
@@ -153,7 +162,7 @@ read_depth_pixels( GLcontext *ctx,
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, width, x, y, dst);
+ _swrast_read_depth_span(ctx, rb, width, x, y, dst);
}
}
else {
@@ -163,7 +172,7 @@ read_depth_pixels( GLcontext *ctx,
GLfloat depth[MAX_WIDTH];
GLvoid *dest;
- _swrast_read_depth_span_float(ctx, readWidth, x, y, depth);
+ _swrast_read_depth_span_float(ctx, rb, readWidth, x, y, depth);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, j, 0);
@@ -185,8 +194,15 @@ read_stencil_pixels( GLcontext *ctx,
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ struct gl_renderbuffer *rb
+ = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
GLint j, readWidth;
+ if (!rb) {
+ /* no readbuffer - OK */
+ return;
+ }
+
if (type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
type != GL_SHORT &&
@@ -199,21 +215,21 @@ 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;
-
if (ctx->Visual.stencilBits <= 0) {
/* No stencil buffer */
_mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" );
return;
}
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
/* process image row by row */
for (j=0;j<height;j++,y++) {
GLvoid *dest;
GLstencil stencil[MAX_WIDTH];
- _swrast_read_stencil_span(ctx, readWidth, x, y, stencil);
+ _swrast_read_stencil_span(ctx, rb, readWidth, x, y, stencil);
dest = _mesa_image_address2d(packing, pixels, width, height,
GL_STENCIL_INDEX, type, j, 0);
@@ -237,7 +253,7 @@ read_fast_rgba_pixels( GLcontext *ctx,
GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
/* can't do scale, bias, mapping, etc */
if (ctx->_ImageTransferState)
return GL_FALSE;
@@ -285,12 +301,16 @@ read_fast_rgba_pixels( GLcontext *ctx,
}
for (row=0; row<readHeight; row++) {
- (*swrast->Driver.ReadRGBASpan)(ctx, readWidth, srcX, srcY,
+#if OLD_RENDERBUFFER && 0
+ (*swrast->Driver.ReadRGBASpan)(ctx, rb, readWidth, srcX, srcY,
(GLchan (*)[4]) dest);
if (ctx->DrawBuffer->UseSoftwareAlphaBuffers) {
_swrast_read_alpha_span(ctx, readWidth, srcX, srcY,
(GLchan (*)[4]) dest);
}
+#else
+ rb->GetRow(ctx, rb, readWidth, srcX, srcY, dest);
+#endif
dest += rowLength * 4;
srcY++;
}
@@ -315,22 +335,17 @@ read_rgba_pixels( GLcontext *ctx,
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ /*
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ */
GLint readWidth;
- _swrast_use_read_buffer(ctx);
-
- /* Try optimized path first */
- if (read_fast_rgba_pixels( ctx, x, y, width, height,
- format, type, pixels, packing )) {
-
- _swrast_use_draw_buffer(ctx);
- return; /* done! */
+ if (!rb) {
+ /* No readbuffer is OK with GL_EXT_framebuffer_object */
+ return;
}
- /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
- readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
-
/* do error checking on pixel type, format was already checked by caller */
switch (type) {
case GL_UNSIGNED_BYTE:
@@ -371,6 +386,20 @@ read_rgba_pixels( GLcontext *ctx,
return;
}
+ _swrast_use_read_buffer(ctx);
+
+ /* Try optimized path first */
+ if (read_fast_rgba_pixels( ctx, x, y, width, height,
+ format, type, pixels, packing )) {
+
+ _swrast_use_draw_buffer(ctx);
+ return; /* done! */
+ }
+
+ /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */
+ readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
+
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
const GLuint transferOps = ctx->_ImageTransferState;
GLfloat *dest, *src, *tmpImage, *convImage;
@@ -393,11 +422,12 @@ 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, ctx->ReadBuffer, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
- (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) {
_mesa_map_ci(ctx, readWidth, index);
}
@@ -439,11 +469,12 @@ read_rgba_pixels( GLcontext *ctx,
GLchan rgba[MAX_WIDTH][4];
GLvoid *dst;
if (ctx->Visual.rgbMode) {
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
- (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ rb->GetRow(ctx, rb, readWidth, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
_mesa_map_ci(ctx, readWidth, index);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-27 08:26:52 +0000