/*
* Mesa 3-D graphics library
- * Version: 6.3
*
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
-#include "glheader.h"
-#include "context.h"
-#include "colormac.h"
-#include "convolve.h"
-#include "histogram.h"
-#include "image.h"
-#include "macros.h"
-#include "imports.h"
-#include "pixel.h"
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/condrender.h"
+#include "main/macros.h"
+#include "main/pixeltransfer.h"
+#include "main/imports.h"
#include "s_context.h"
#include "s_depth.h"
-#include "s_pixeltex.h"
#include "s_span.h"
#include "s_stencil.h"
-#include "s_texture.h"
#include "s_zoom.h"
-/*
+/**
* Determine if there's overlap in an image copy.
* This test also compensates for the fact that copies are done from
* bottom to top and overlaps can sometimes be handled correctly
* without making a temporary image copy.
+ * \return GL_TRUE if the regions overlap, GL_FALSE otherwise.
*/
static GLboolean
regions_overlap(GLint srcx, GLint srcy,
}
else {
/* add one pixel of slop when zooming, just to be safe */
- if ((srcx > dstx + (width * zoomX) + 1) || (srcx + width + 1 < dstx)) {
+ if (srcx > (dstx + ((zoomX > 0.0F) ? (width * zoomX + 1.0F) : 0.0F))) {
+ /* src is completely right of dest */
+ return GL_FALSE;
+ }
+ else if (srcx + width + 1.0F < dstx + ((zoomX > 0.0F) ? 0.0F : (width * zoomX))) {
+ /* src is completely left of dest */
return GL_FALSE;
}
else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) {
+ /* src is completely below dest */
return GL_FALSE;
}
else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) {
+ /* src is completely above dest */
return GL_FALSE;
}
else {
/**
- * Convert GLfloat[n][4] colors to GLchan[n][4].
- * XXX maybe move into image.c
- */
-static void
-float_span_to_chan(GLuint n, CONST GLfloat in[][4], GLchan out[][4])
-{
- GLuint i;
- for (i = 0; i < n; i++) {
- UNCLAMPED_FLOAT_TO_CHAN(out[i][RCOMP], in[i][RCOMP]);
- UNCLAMPED_FLOAT_TO_CHAN(out[i][GCOMP], in[i][GCOMP]);
- UNCLAMPED_FLOAT_TO_CHAN(out[i][BCOMP], in[i][BCOMP]);
- UNCLAMPED_FLOAT_TO_CHAN(out[i][ACOMP], in[i][ACOMP]);
- }
-}
-
-
-/**
- * Convert GLchan[n][4] colors to GLfloat[n][4].
- * XXX maybe move into image.c
- */
-static void
-chan_span_to_float(GLuint n, CONST GLchan in[][4], GLfloat out[][4])
-{
- GLuint i;
- for (i = 0; i < n; i++) {
- out[i][RCOMP] = CHAN_TO_FLOAT(in[i][RCOMP]);
- out[i][GCOMP] = CHAN_TO_FLOAT(in[i][GCOMP]);
- out[i][BCOMP] = CHAN_TO_FLOAT(in[i][BCOMP]);
- out[i][ACOMP] = CHAN_TO_FLOAT(in[i][ACOMP]);
- }
-}
-
-
-
-/*
- * RGBA copypixels with convolution.
- */
-static void
-copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
- GLint width, GLint height, GLint destx, GLint desty)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *drawRb = NULL;
- GLboolean quick_draw;
- GLint row;
- GLboolean changeBuffer;
- const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
- const GLuint transferOps = ctx->_ImageTransferState;
- GLfloat *dest, *tmpImage, *convImage;
- struct sw_span span;
-
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
-
- if (ctx->Depth.Test)
- _swrast_span_default_z(ctx, &span);
- if (ctx->Fog.Enabled)
- _swrast_span_default_fog(ctx, &span);
-
-
- if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
- && !zoom
- && destx >= 0
- && destx + width <= (GLint) ctx->DrawBuffer->Width) {
- quick_draw = GL_TRUE;
- drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
- }
- else {
- quick_draw = GL_FALSE;
- }
-
- /* If read and draw buffer are different we must do buffer switching */
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
- || ctx->DrawBuffer != ctx->ReadBuffer;
-
-
- /* allocate space for GLfloat image */
- tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
- if (!tmpImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
- return;
- }
- convImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
- if (!convImage) {
- FREE(tmpImage);
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
- return;
- }
-
- if (changeBuffer) {
- /* choose the read buffer */
- _swrast_use_read_buffer(ctx);
- }
-
- /* read source image */
- dest = tmpImage;
- for (row = 0; row < height; row++) {
- GLchan rgba[MAX_WIDTH][4];
- /* Read GLchan and convert to GLfloat */
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
- width, srcx, srcy + row, rgba);
- chan_span_to_float(width, (CONST GLchan (*)[4]) rgba,
- (GLfloat (*)[4]) dest);
- dest += 4 * width;
- }
-
- if (changeBuffer) {
- /* restore default src/dst buffer */
- _swrast_use_draw_buffer(ctx);
- }
-
- /* do the image transfer ops which preceed convolution */
- for (row = 0; row < height; row++) {
- GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4);
- _mesa_apply_rgba_transfer_ops(ctx,
- transferOps & IMAGE_PRE_CONVOLUTION_BITS,
- width, rgba);
- }
-
- /* do convolution */
- if (ctx->Pixel.Convolution2DEnabled) {
- _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
- }
- else {
- ASSERT(ctx->Pixel.Separable2DEnabled);
- _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
- }
- FREE(tmpImage);
-
- /* do remaining post-convolution image transfer ops */
- for (row = 0; row < height; row++) {
- GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4);
- _mesa_apply_rgba_transfer_ops(ctx,
- transferOps & IMAGE_POST_CONVOLUTION_BITS,
- width, rgba);
- }
-
- /* write the new image */
- for (row = 0; row < height; row++) {
- const GLfloat *src = convImage + row * width * 4;
- GLint dy;
-
- /* convert floats back to chan */
- float_span_to_chan(width, (const GLfloat (*)[4]) src, span.array->rgba);
-
- if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
- span.end = width;
- _swrast_pixel_texture(ctx, &span);
- }
-
- /* write row to framebuffer */
-
- dy = desty + row;
- if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
-#if OLD_RENDERBUFFER
- if (swrast->Driver.WriteRGBASpan)
- swrast->Driver.WriteRGBASpan(ctx, drawRb, width, destx, dy,
- (const GLchan (*)[4]) span.array->rgba, NULL);
- else
-#endif
- drawRb->PutRow(ctx, drawRb, width, destx, dy,
- span.array->rgba, NULL);
- }
- else if (zoom) {
- span.x = destx;
- span.y = dy;
- span.end = width;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4])span.array->rgba,
- desty, 0);
- }
- else {
- span.x = destx;
- span.y = dy;
- span.end = width;
- _swrast_write_rgba_span(ctx, &span);
- }
- }
-
- FREE(convImage);
-}
-
-
-/*
* RGBA copypixels
*/
static void
-copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
+copy_rgba_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *drawRb;
- GLchan *tmpImage,*p;
- GLboolean quick_draw;
- GLint sy, dy, stepy, j;
- GLboolean changeBuffer;
+ GLfloat *tmpImage, *p;
+ GLint sy, dy, stepy, row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
- const GLuint transferOps = ctx->_ImageTransferState;
- struct sw_span span;
+ GLuint transferOps = ctx->_ImageTransferState;
+ SWspan span;
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
return;
}
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
-
- if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
- copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
- return;
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
}
/* Determine if copy should be done bottom-to-top or top-to-bottom */
- if (srcy < desty) {
+ if (!overlapping && srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = 1;
}
- if (ctx->DrawBuffer == ctx->ReadBuffer) {
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
- }
- else {
- overlapping = GL_FALSE;
- }
-
- if (ctx->Depth.Test)
- _swrast_span_default_z(ctx, &span);
- if (ctx->Fog.Enabled)
- _swrast_span_default_fog(ctx, &span);
-
- if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
- && !zoom
- && destx >= 0
- && destx + width <= (GLint) ctx->DrawBuffer->Width) {
- quick_draw = GL_TRUE;
- drawRb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
- }
- else {
- quick_draw = GL_FALSE;
- drawRb = NULL;
- }
-
- /* If read and draw buffer are different we must do buffer switching */
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
- || ctx->DrawBuffer != ctx->ReadBuffer;
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = VARYING_BIT_COL0; /* we'll fill in COL0 attrib values */
if (overlapping) {
- GLint ssy = sy;
- tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 4);
+ tmpImage = malloc(width * height * sizeof(GLfloat) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
- /* setup source */
- if (changeBuffer)
- _swrast_use_read_buffer(ctx);
- /* read the source image */
+ /* read the source image as RGBA/float */
p = tmpImage;
- for (j = 0; j < height; j++, ssy += stepy) {
+ for (row = 0; row < height; row++) {
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
- width, srcx, ssy, (GLchan (*)[4]) p );
+ width, srcx, sy + row, p );
p += width * 4;
}
p = tmpImage;
- /* restore dest */
- if (changeBuffer) {
- _swrast_use_draw_buffer(ctx);
- changeBuffer = GL_FALSE;
- }
}
else {
tmpImage = NULL; /* silence compiler warnings */
p = NULL;
}
- for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
- /* Get source pixels */
+ assert(width < SWRAST_MAX_WIDTH);
+
+ for (row = 0; row < height; row++, sy += stepy, dy += stepy) {
+ GLvoid *rgba = span.array->attribs[VARYING_SLOT_COL0];
+
+ /* Get row/span of source pixels */
if (overlapping) {
/* get from buffered image */
- ASSERT(width < MAX_WIDTH);
- MEMCPY(span.array->rgba, p, width * sizeof(GLchan) * 4);
+ memcpy(rgba, p, width * sizeof(GLfloat) * 4);
p += width * 4;
}
else {
/* get from framebuffer */
- if (changeBuffer)
- _swrast_use_read_buffer(ctx);
- ASSERT(width < MAX_WIDTH);
_swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
- width, srcx, sy, span.array->rgba );
- if (changeBuffer)
- _swrast_use_draw_buffer(ctx);
+ width, srcx, sy, rgba );
}
if (transferOps) {
- DEFMARRAY(GLfloat, rgbaFloat, MAX_WIDTH, 4); /* mac 32k limitation */
- CHECKARRAY(rgbaFloat, return);
-
- /* convert to float, transfer, convert back to chan */
- chan_span_to_float(width, (CONST GLchan (*)[4]) span.array->rgba,
- rgbaFloat);
- _mesa_apply_rgba_transfer_ops(ctx, transferOps, width, rgbaFloat);
- float_span_to_chan(width, (CONST GLfloat (*)[4]) rgbaFloat,
- span.array->rgba);
-
- UNDEFARRAY(rgbaFloat); /* mac 32k limitation */
- }
-
- if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
- span.end = width;
- _swrast_pixel_texture(ctx, &span);
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width,
+ (GLfloat (*)[4]) rgba);
}
/* Write color span */
- if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
-#if OLD_RENDERBUFFER
- if (swrast->Driver.WriteRGBASpan)
- swrast->Driver.WriteRGBASpan(ctx, drawRb, width, destx, dy,
- (const GLchan (*)[4])span.array->rgba, NULL);
- else
-#endif
- drawRb->PutRow(ctx, drawRb, width, destx, dy, span.array->rgba, NULL);
-
- }
- else if (zoom) {
- span.x = destx;
- span.y = dy;
- span.end = width;
- _swrast_write_zoomed_rgba_span(ctx, &span,
- (CONST GLchan (*)[4]) span.array->rgba,
- desty, 0);
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ span.array->ChanType = GL_FLOAT;
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
}
else {
- span.x = destx;
- span.y = dy;
- span.end = width;
_swrast_write_rgba_span(ctx, &span);
}
}
+ span.array->ChanType = CHAN_TYPE; /* restore */
+
if (overlapping)
- FREE(tmpImage);
+ free(tmpImage);
}
+/**
+ * Convert floating point Z values to integer Z values with pixel transfer's
+ * Z scale and bias.
+ */
static void
-copy_ci_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
- GLint width, GLint height,
- GLint destx, GLint desty )
+scale_and_bias_z(struct gl_context *ctx, GLuint width,
+ const GLfloat depth[], GLuint z[])
{
- GLuint *tmpImage,*p;
- GLint sy, dy, stepy;
- GLint j;
- GLboolean changeBuffer;
- const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
- const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset;
- GLint overlapping;
- struct sw_span span;
-
- if (!ctx->ReadBuffer->_ColorReadBuffer) {
- /* no readbuffer - OK */
- return;
- }
-
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
-
- /* Determine if copy should be bottom-to-top or top-to-bottom */
- if (srcy<desty) {
- /* top-down max-to-min */
- sy = srcy + height - 1;
- dy = desty + height - 1;
- stepy = -1;
- }
- else {
- /* bottom-up min-to-max */
- sy = srcy;
- dy = desty;
- stepy = 1;
- }
-
- if (ctx->DrawBuffer == ctx->ReadBuffer) {
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
- }
- else {
- overlapping = GL_FALSE;
- }
-
- if (ctx->Depth.Test)
- _swrast_span_default_z(ctx, &span);
- if (ctx->Fog.Enabled)
- _swrast_span_default_fog(ctx, &span);
-
- /* If read and draw buffer are different we must do buffer switching */
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer[0]
- || ctx->DrawBuffer != ctx->ReadBuffer;
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ GLuint i;
- if (overlapping) {
- GLint ssy = sy;
- tmpImage = (GLuint *) MALLOC(width * height * sizeof(GLuint));
- if (!tmpImage) {
- _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
- return;
- }
- /* setup source */
- if (changeBuffer)
- _swrast_use_read_buffer(ctx);
- /* read the image */
- p = tmpImage;
- for (j = 0; j < height; j++, ssy += stepy) {
- _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
- width, srcx, ssy, p );
- p += width;
- }
- p = tmpImage;
- /* restore to draw buffer */
- if (changeBuffer) {
- _swrast_use_draw_buffer(ctx);
- changeBuffer = GL_FALSE;
+ if (depthMax <= 0xffffff &&
+ ctx->Pixel.DepthScale == 1.0 &&
+ ctx->Pixel.DepthBias == 0.0) {
+ /* no scale or bias and no clamping and no worry of overflow */
+ const GLfloat depthMaxF = ctx->DrawBuffer->_DepthMaxF;
+ for (i = 0; i < width; i++) {
+ z[i] = (GLuint) (depth[i] * depthMaxF);
}
}
else {
- tmpImage = NULL; /* silence compiler warning */
- p = NULL;
- }
-
- for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
- /* Get color indexes */
- if (overlapping) {
- MEMCPY(span.array->index, p, width * sizeof(GLuint));
- p += width;
- }
- else {
- if (changeBuffer)
- _swrast_use_read_buffer(ctx);
- _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
- width, srcx, sy, span.array->index );
- if (changeBuffer)
- _swrast_use_draw_buffer(ctx);
- }
-
- /* Apply shift, offset, look-up table */
- if (shift_or_offset) {
- _mesa_shift_and_offset_ci( ctx, width, span.array->index );
- }
- if (ctx->Pixel.MapColorFlag) {
- _mesa_map_ci( ctx, width, span.array->index );
+ /* need to be careful with overflow */
+ const GLdouble depthMaxF = ctx->DrawBuffer->_DepthMaxF;
+ for (i = 0; i < width; i++) {
+ GLdouble d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
+ d = CLAMP(d, 0.0, 1.0) * depthMaxF;
+ if (d >= depthMaxF)
+ z[i] = depthMax;
+ else
+ z[i] = (GLuint) d;
}
-
- /* write color indexes */
- span.x = destx;
- span.y = dy;
- span.end = width;
- if (zoom)
- _swrast_write_zoomed_index_span(ctx, &span, desty, 0);
- else
- _swrast_write_index_span(ctx, &span);
}
-
- if (overlapping)
- FREE(tmpImage);
}
* TODO: Optimize!!!!
*/
static void
-copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+copy_depth_pixels( struct gl_context *ctx, GLint srcx, GLint srcy,
GLint width, GLint height,
GLint destx, GLint desty )
{
- const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
- struct gl_renderbuffer *readRb
- = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- GLfloat *p, *tmpImage;
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *readRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ GLfloat *p, *tmpImage, *depth;
GLint sy, dy, stepy;
- GLint i, j;
+ GLint j;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
- struct sw_span span;
+ SWspan span;
if (!readRb) {
/* no readbuffer - OK */
return;
}
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_Z;
- if (!ctx->Visual.depthBits) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
- return;
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
}
/* Determine if copy should be bottom-to-top or top-to-bottom */
- if (srcy<desty) {
+ if (!overlapping && srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = 1;
}
- if (ctx->DrawBuffer == ctx->ReadBuffer) {
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
- }
- else {
- overlapping = GL_FALSE;
- }
-
- _swrast_span_default_color(ctx, &span);
- if (ctx->Fog.Enabled)
- _swrast_span_default_fog(ctx, &span);
-
if (overlapping) {
GLint ssy = sy;
- tmpImage = (GLfloat *) MALLOC(width * height * sizeof(GLfloat));
+ tmpImage = malloc(width * height * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
p = NULL;
}
+ depth = malloc(width * sizeof(GLfloat));
+ if (!depth) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels()");
+ goto end;
+ }
+
for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
- GLfloat depth[MAX_WIDTH];
- float sum = 0;
/* get depth values */
if (overlapping) {
- MEMCPY(depth, p, width * sizeof(GLfloat));
+ memcpy(depth, p, width * sizeof(GLfloat));
p += width;
}
else {
}
/* apply scale and bias */
- for (i = 0; i < width; i++) {
- GLfloat d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
- sum += d;
- span.array->z[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * depthMax);
- }
+ scale_and_bias_z(ctx, width, depth, span.array->z);
/* write depth values */
span.x = destx;
span.y = dy;
span.end = width;
- if (ctx->Visual.rgbMode) {
- if (zoom)
- _swrast_write_zoomed_rgba_span( ctx, &span,
- (const GLchan (*)[4])span.array->rgba, desty, 0 );
- else
- _swrast_write_rgba_span(ctx, &span);
- }
- else {
- if (zoom)
- _swrast_write_zoomed_index_span( ctx, &span, desty, 0 );
- else
- _swrast_write_index_span(ctx, &span);
- }
+ if (zoom)
+ _swrast_write_zoomed_depth_span(ctx, destx, desty, &span);
+ else
+ _swrast_write_rgba_span(ctx, &span);
}
+ free(depth);
+
+end:
if (overlapping)
- FREE(tmpImage);
+ free(tmpImage);
}
static void
-copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+copy_stencil_pixels( struct gl_context *ctx, GLint srcx, GLint srcy,
GLint width, GLint height,
GLint destx, GLint desty )
{
- struct gl_renderbuffer *rb
- = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLint sy, dy, stepy;
GLint j;
- GLstencil *p, *tmpImage;
+ GLubyte *p, *tmpImage, *stencil;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
- const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset;
GLint overlapping;
- if (!ctx->Visual.stencilBits) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
- return;
- }
-
if (!rb) {
/* no readbuffer - OK */
return;
}
+ if (ctx->DrawBuffer == ctx->ReadBuffer) {
+ overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
+ ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
+ }
+ else {
+ overlapping = GL_FALSE;
+ }
+
/* Determine if copy should be bottom-to-top or top-to-bottom */
- if (srcy < desty) {
+ if (!overlapping && srcy < desty) {
/* top-down max-to-min */
sy = srcy + height - 1;
dy = desty + height - 1;
stepy = 1;
}
- if (ctx->DrawBuffer == ctx->ReadBuffer) {
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
- }
- else {
- overlapping = GL_FALSE;
- }
-
if (overlapping) {
GLint ssy = sy;
- tmpImage = (GLstencil *) MALLOC(width * height * sizeof(GLstencil));
+ tmpImage = malloc(width * height * sizeof(GLubyte));
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
p = NULL;
}
- for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
- GLstencil stencil[MAX_WIDTH];
+ stencil = malloc(width * sizeof(GLubyte));
+ if (!stencil) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels()");
+ goto end;
+ }
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
/* Get stencil values */
if (overlapping) {
- MEMCPY(stencil, p, width * sizeof(GLstencil));
+ memcpy(stencil, p, width * sizeof(GLubyte));
p += width;
}
else {
_swrast_read_stencil_span( ctx, rb, width, srcx, sy, stencil );
}
- /* Apply shift, offset, look-up table */
- if (shift_or_offset) {
- _mesa_shift_and_offset_stencil( ctx, width, stencil );
- }
- if (ctx->Pixel.MapStencilFlag) {
- _mesa_map_stencil( ctx, width, stencil );
- }
+ _mesa_apply_stencil_transfer_ops(ctx, width, stencil);
/* Write stencil values */
if (zoom) {
- _swrast_write_zoomed_stencil_span( ctx, width, destx, dy,
- stencil, desty, 0 );
+ _swrast_write_zoomed_stencil_span(ctx, destx, desty, width,
+ destx, dy, stencil);
}
else {
_swrast_write_stencil_span( ctx, width, destx, dy, stencil );
}
}
+ free(stencil);
+
+end:
if (overlapping)
- FREE(tmpImage);
+ free(tmpImage);
}
+/**
+ * Try to do a fast 1:1 blit with memcpy.
+ * \return GL_TRUE if successful, GL_FALSE otherwise.
+ */
+GLboolean
+swrast_fast_copy_pixels(struct gl_context *ctx,
+ struct gl_framebuffer *srcFb,
+ struct gl_framebuffer *dstFb,
+ GLint srcX, GLint srcY, GLsizei width, GLsizei height,
+ GLint dstX, GLint dstY, GLenum type)
+{
+ struct gl_renderbuffer *srcRb, *dstRb;
+ GLint row;
+ GLuint pixelBytes, widthInBytes;
+ GLubyte *srcMap, *dstMap;
+ GLint srcRowStride, dstRowStride;
+ if (type == GL_COLOR) {
+ if (dstFb->_NumColorDrawBuffers != 1)
+ return GL_FALSE;
+ srcRb = srcFb->_ColorReadBuffer;
+ dstRb = dstFb->_ColorDrawBuffers[0];
+ }
+ else if (type == GL_STENCIL) {
+ srcRb = srcFb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ dstRb = dstFb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ }
+ else if (type == GL_DEPTH) {
+ srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ }
+ else {
+ assert(type == GL_DEPTH_STENCIL_EXT);
+ /* XXX correct? */
+ srcRb = srcFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ dstRb = dstFb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ }
+
+ /* src and dst renderbuffers must be same format */
+ if (!srcRb || !dstRb || srcRb->Format != dstRb->Format) {
+ return GL_FALSE;
+ }
+
+ if (type == GL_STENCIL || type == GL_DEPTH_COMPONENT) {
+ /* can't handle packed depth+stencil here */
+ if (_mesa_is_format_packed_depth_stencil(srcRb->Format) ||
+ _mesa_is_format_packed_depth_stencil(dstRb->Format))
+ return GL_FALSE;
+ }
+ else if (type == GL_DEPTH_STENCIL) {
+ /* can't handle separate depth/stencil buffers */
+ if (srcRb != srcFb->Attachment[BUFFER_STENCIL].Renderbuffer ||
+ dstRb != dstFb->Attachment[BUFFER_STENCIL].Renderbuffer)
+ return GL_FALSE;
+ }
+
+ /* clipping not supported */
+ if (srcX < 0 || srcX + width > (GLint) srcFb->Width ||
+ srcY < 0 || srcY + height > (GLint) srcFb->Height ||
+ dstX < dstFb->_Xmin || dstX + width > dstFb->_Xmax ||
+ dstY < dstFb->_Ymin || dstY + height > dstFb->_Ymax) {
+ return GL_FALSE;
+ }
+
+ pixelBytes = _mesa_get_format_bytes(srcRb->Format);
+ widthInBytes = width * pixelBytes;
+
+ if (srcRb == dstRb) {
+ /* map whole buffer for read/write */
+ /* XXX we could be clever and just map the union region of the
+ * source and dest rects.
+ */
+ GLubyte *map;
+ GLint rowStride;
+
+ ctx->Driver.MapRenderbuffer(ctx, srcRb, 0, 0,
+ srcRb->Width, srcRb->Height,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ &map, &rowStride);
+ if (!map) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ return GL_TRUE; /* don't retry with slow path */
+ }
+
+ srcMap = map + srcY * rowStride + srcX * pixelBytes;
+ dstMap = map + dstY * rowStride + dstX * pixelBytes;
+
+ /* this handles overlapping copies */
+ if (srcY < dstY) {
+ /* copy in reverse (top->down) order */
+ srcMap += rowStride * (height - 1);
+ dstMap += rowStride * (height - 1);
+ srcRowStride = -rowStride;
+ dstRowStride = -rowStride;
+ }
+ else {
+ /* copy in normal (bottom->up) order */
+ srcRowStride = rowStride;
+ dstRowStride = rowStride;
+ }
+ }
+ else {
+ /* different src/dst buffers */
+ ctx->Driver.MapRenderbuffer(ctx, srcRb, srcX, srcY,
+ width, height,
+ GL_MAP_READ_BIT, &srcMap, &srcRowStride);
+ if (!srcMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ return GL_TRUE; /* don't retry with slow path */
+ }
+ ctx->Driver.MapRenderbuffer(ctx, dstRb, dstX, dstY,
+ width, height,
+ GL_MAP_WRITE_BIT, &dstMap, &dstRowStride);
+ if (!dstMap) {
+ ctx->Driver.UnmapRenderbuffer(ctx, srcRb);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ return GL_TRUE; /* don't retry with slow path */
+ }
+ }
+
+ for (row = 0; row < height; row++) {
+ /* memmove() in case of overlap */
+ memmove(dstMap, srcMap, widthInBytes);
+ dstMap += dstRowStride;
+ srcMap += srcRowStride;
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, srcRb);
+ if (dstRb != srcRb) {
+ ctx->Driver.UnmapRenderbuffer(ctx, dstRb);
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Find/map the renderbuffer that we'll be reading from.
+ * The swrast_render_start() function only maps the drawing buffers,
+ * not the read buffer.
+ */
+static struct gl_renderbuffer *
+map_readbuffer(struct gl_context *ctx, GLenum type)
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb;
+ struct swrast_renderbuffer *srb;
+
+ switch (type) {
+ case GL_COLOR:
+ rb = fb->Attachment[fb->_ColorReadBufferIndex].Renderbuffer;
+ break;
+ case GL_DEPTH:
+ case GL_DEPTH_STENCIL:
+ rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ break;
+ case GL_STENCIL:
+ rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ break;
+ default:
+ return NULL;
+ }
+
+ srb = swrast_renderbuffer(rb);
+
+ if (!srb || srb->Map) {
+ /* no buffer, or buffer is mapped already, we're done */
+ return NULL;
+ }
+
+ ctx->Driver.MapRenderbuffer(ctx, rb,
+ 0, 0, rb->Width, rb->Height,
+ GL_MAP_READ_BIT,
+ &srb->Map, &srb->RowStride);
+
+ return rb;
+}
+
+
+/**
+ * Do software-based glCopyPixels.
+ * By time we get here, all parameters will have been error-checked.
+ */
void
-_swrast_CopyPixels( GLcontext *ctx,
- GLint srcx, GLint srcy, GLsizei width, GLsizei height,
- GLint destx, GLint desty,
- GLenum type )
+_swrast_CopyPixels(struct gl_context *ctx,
+ GLint srcx, GLint srcy, GLsizei width, GLsizei height,
+ GLint destx, GLint desty, GLenum type)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- RENDER_START(swrast,ctx);
+ struct gl_renderbuffer *rb;
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't copy */
+
if (swrast->NewState)
_swrast_validate_derived( ctx );
- if (type == GL_COLOR && ctx->Visual.rgbMode) {
- copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
- }
- else if (type == GL_COLOR && !ctx->Visual.rgbMode) {
- copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ if (!(SWRAST_CONTEXT(ctx)->_RasterMask != 0x0 ||
+ ctx->Pixel.ZoomX != 1.0F ||
+ ctx->Pixel.ZoomY != 1.0F ||
+ ctx->_ImageTransferState) &&
+ swrast_fast_copy_pixels(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
+ srcx, srcy, width, height, destx, desty,
+ type)) {
+ /* all done */
+ return;
}
- else if (type == GL_DEPTH) {
+
+ swrast_render_start(ctx);
+ rb = map_readbuffer(ctx, type);
+
+ switch (type) {
+ case GL_COLOR:
+ copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_DEPTH:
copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
- }
- else if (type == GL_STENCIL) {
+ break;
+ case GL_STENCIL:
copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glCopyPixels" );
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ /* Copy buffers separately (if the fast copy path wasn't taken) */
+ copy_depth_pixels(ctx, srcx, srcy, width, height, destx, desty);
+ copy_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected type in _swrast_CopyPixels");
}
- RENDER_FINISH(swrast,ctx);
+ swrast_render_finish(ctx);
+
+ if (rb) {
+ struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+ srb->Map = NULL;
+ }
}
projects / mesa.git / blobdiff