-/* $Id: s_copypix.c,v 1.38 2002/06/15 03:03:11 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 7.1
*
- * Copyright (C) 1999-2002 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"),
*/
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "convolve.h"
-#include "feedback.h"
-#include "macros.h"
-#include "mem.h"
-#include "mmath.h"
-#include "pixel.h"
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/convolve.h"
+#include "main/histogram.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/pixel.h"
#include "s_context.h"
#include "s_depth.h"
-#include "s_histogram.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 {
}
-
-/*
+/**
* 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);
- GLboolean quick_draw;
GLint row;
- GLboolean changeBuffer;
- GLchan *saveReadAlpha;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
- const GLuint transferOps = ctx->_ImageTransferState;
+ const GLbitfield transferOps = ctx->_ImageTransferState;
+ const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink)
+ || (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink);
GLfloat *dest, *tmpImage, *convImage;
- struct sw_span *span = swrast->span;
-
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
-
- if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, span);
- if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, span);
-
-
- if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
- && !zoom
- && destx >= 0
- && destx + width <= (GLint) ctx->DrawBuffer->Width) {
- quick_draw = GL_TRUE;
- }
- else {
- quick_draw = GL_FALSE;
- }
-
- /* If read and draw buffer are different we must do buffer switching */
- saveReadAlpha = ctx->ReadBuffer->Alpha;
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
- || ctx->DrawBuffer != ctx->ReadBuffer;
+ SWspan span;
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0;
/* allocate space for GLfloat image */
- tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
+ tmpImage = (GLfloat *) _mesa_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));
+ convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!convImage) {
- FREE(tmpImage);
+ _mesa_free(tmpImage);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
return;
}
- dest = tmpImage;
-
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- else
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
- }
-
- /* read source image */
+ /* read source image as float/RGBA */
dest = tmpImage;
for (row = 0; row < height; row++) {
- GLchan rgba[MAX_WIDTH][4];
- GLint i;
- _mesa_read_rgba_span(ctx, ctx->ReadBuffer, width, srcx, srcy + row, rgba);
- /* convert GLchan to GLfloat */
- for (i = 0; i < width; i++) {
- *dest++ = (GLfloat) rgba[i][RCOMP] * (1.0F / CHAN_MAXF);
- *dest++ = (GLfloat) rgba[i][GCOMP] * (1.0F / CHAN_MAXF);
- *dest++ = (GLfloat) rgba[i][BCOMP] * (1.0F / CHAN_MAXF);
- *dest++ = (GLfloat) rgba[i][ACOMP] * (1.0F / CHAN_MAXF);
- }
- }
-
- /* read from the draw buffer again (in case of blending) */
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- ctx->ReadBuffer->Alpha = saveReadAlpha;
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, srcy + row, GL_FLOAT, dest);
+ dest += 4 * width;
}
- /* do image transfer ops up until convolution */
+ /* do the image transfer ops which preceed convolution */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4);
-
- /* scale & bias */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(ctx, width, rgba,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba(ctx, width, rgba);
- }
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->ColorTable, width, rgba);
- }
+ _mesa_apply_rgba_transfer_ops(ctx,
+ transferOps & IMAGE_PRE_CONVOLUTION_BITS,
+ width, rgba);
}
/* do convolution */
ASSERT(ctx->Pixel.Separable2DEnabled);
_mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
}
- FREE(tmpImage);
+ _mesa_free(tmpImage);
- /* do remaining image transfer ops */
+ /* do remaining post-convolution image transfer ops */
for (row = 0; row < height; row++) {
GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4);
-
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, width, rgba);
- }
- /* color matrix */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, width, rgba);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, width, rgba);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- _mesa_update_histogram(ctx, width, (CONST GLfloat (*)[4]) rgba);
- }
- /* update min/max */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- _mesa_update_minmax(ctx, width, (CONST GLfloat (*)[4]) rgba);
- }
- }
-
- for (row = 0; row < height; row++) {
- const GLfloat *src = convImage + row * width * 4;
- GLint i, dy;
-
- /* clamp to [0,1] and convert float back to chan */
- for (i = 0; i < width; i++) {
- GLint r = (GLint) (src[i * 4 + RCOMP] * CHAN_MAXF);
- GLint g = (GLint) (src[i * 4 + GCOMP] * CHAN_MAXF);
- GLint b = (GLint) (src[i * 4 + BCOMP] * CHAN_MAXF);
- GLint a = (GLint) (src[i * 4 + ACOMP] * CHAN_MAXF);
- span->color.rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX);
- span->color.rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX);
- span->color.rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX);
- span->color.rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
- }
-
- 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) {
- (*swrast->Driver.WriteRGBASpan)( ctx, width, destx, dy,
- (const GLchan (*)[4])span->color.rgba, NULL );
- }
- else if (zoom) {
- span->x = destx;
- span->y = dy;
- span->end = width;
- _mesa_write_zoomed_rgba_span(ctx, span,
- (CONST GLchan (*)[4])span->color.rgba,
- desty);
- }
- else {
- span->x = destx;
- span->y = dy;
- span->end = width;
- _mesa_write_rgba_span(ctx, span);
+ _mesa_apply_rgba_transfer_ops(ctx,
+ transferOps & IMAGE_POST_CONVOLUTION_BITS,
+ width, rgba);
+ }
+
+ if (!sink) {
+ /* write the new image */
+ for (row = 0; row < height; row++) {
+ const GLfloat *src = convImage + row * width * 4;
+ GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0];
+
+ /* copy convolved colors into span array */
+ _mesa_memcpy(rgba, src, width * 4 * sizeof(GLfloat));
+
+ /* write span */
+ span.x = destx;
+ span.y = desty + row;
+ span.end = width;
+ span.array->ChanType = GL_FLOAT;
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, destx, desty, &span, rgba);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
}
+ /* restore this */
+ span.array->ChanType = CHAN_TYPE;
}
- FREE(convImage);
+ _mesa_free(convImage);
}
-/*
+/**
* RGBA copypixels
*/
static void
copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLchan *tmpImage,*p;
- GLboolean quick_draw;
- GLint sy, dy, stepy, j;
- GLboolean changeBuffer;
- GLchan *saveReadAlpha;
+ 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 = swrast->span;
+ GLuint transferOps = ctx->_ImageTransferState;
+ SWspan span;
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
return;
}
+ else if (ctx->Pixel.Convolution1DEnabled) {
+ /* make sure we don't apply 1D convolution */
+ transferOps &= ~(IMAGE_CONVOLUTION_BIT |
+ IMAGE_POST_CONVOLUTION_SCALE_BIAS);
+ }
+
+ 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;
}
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
-
- if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, span);
- if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, span);
-
- if (SWRAST_CONTEXT(ctx)->_RasterMask == 0
- && !zoom
- && destx >= 0
- && destx + width <= (GLint) ctx->DrawBuffer->Width) {
- quick_draw = GL_TRUE;
- }
- else {
- quick_draw = GL_FALSE;
- }
-
- /* If read and draw buffer are different we must do buffer switching */
- saveReadAlpha = ctx->ReadBuffer->Alpha;
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
- || ctx->DrawBuffer != ctx->ReadBuffer;
-
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0; /* we'll fill in COL0 attrib values */
if (overlapping) {
- GLint ssy = sy;
- tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 4);
+ tmpImage = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
+ /* read the source image as RGBA/float */
p = tmpImage;
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- else
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
- }
- for (j = 0; j < height; j++, ssy += stepy) {
- _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, ssy,
- (GLchan (*)[4]) p );
+ for (row = 0; row < height; row++) {
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy + row, GL_FLOAT, p );
p += width * 4;
}
p = tmpImage;
p = NULL;
}
- for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
- /* Get source pixels */
+ ASSERT(width < MAX_WIDTH);
+
+ for (row = 0; row < height; row++, sy += stepy, dy += stepy) {
+ GLvoid *rgba = span.array->attribs[FRAG_ATTRIB_COL0];
+
+ /* Get row/span of source pixels */
if (overlapping) {
/* get from buffered image */
- MEMCPY(span->color.rgba, p, width * sizeof(GLchan) * 4);
+ _mesa_memcpy(rgba, p, width * sizeof(GLfloat) * 4);
p += width * 4;
}
else {
/* get from framebuffer */
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- }
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- }
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- }
- else {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
- }
- }
- _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, sy, span->color.rgba );
- }
-
- if (changeBuffer) {
- /* read from the draw buffer again (in case of blending) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- ctx->ReadBuffer->Alpha = saveReadAlpha;
+ _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy, GL_FLOAT, rgba );
}
if (transferOps) {
- const GLfloat scale = (1.0F / CHAN_MAXF);
- GLint k;
- DEFMARRAY(GLfloat, rgbaFloat, MAX_WIDTH, 4); /* mac 32k limitation */
- CHECKARRAY(rgbaFloat, return);
-
- /* convert chan to float */
- for (k = 0; k < width; k++) {
- rgbaFloat[k][RCOMP] = (GLfloat) span->color.rgba[k][RCOMP] * scale;
- rgbaFloat[k][GCOMP] = (GLfloat) span->color.rgba[k][GCOMP] * scale;
- rgbaFloat[k][BCOMP] = (GLfloat) span->color.rgba[k][BCOMP] * scale;
- rgbaFloat[k][ACOMP] = (GLfloat) span->color.rgba[k][ACOMP] * scale;
- }
- /* scale & bias */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(ctx, width, rgbaFloat,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba(ctx, width, rgbaFloat);
- }
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->ColorTable, width, rgbaFloat);
- }
- /* convolution */
- if (transferOps & IMAGE_CONVOLUTION_BIT) {
- abort(); /* should never get here; caught at top of function */
- }
- /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
- if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
- _mesa_scale_and_bias_rgba(ctx, width, rgbaFloat,
- ctx->Pixel.PostConvolutionScale[RCOMP],
- ctx->Pixel.PostConvolutionScale[GCOMP],
- ctx->Pixel.PostConvolutionScale[BCOMP],
- ctx->Pixel.PostConvolutionScale[ACOMP],
- ctx->Pixel.PostConvolutionBias[RCOMP],
- ctx->Pixel.PostConvolutionBias[GCOMP],
- ctx->Pixel.PostConvolutionBias[BCOMP],
- ctx->Pixel.PostConvolutionBias[ACOMP]);
- }
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, width, rgbaFloat);
- }
- /* color matrix */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, width, rgbaFloat);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, width, rgbaFloat);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- _mesa_update_histogram(ctx, width, (CONST GLfloat (*)[4]) rgbaFloat);
- }
- /* update min/max */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- _mesa_update_minmax(ctx, width, (CONST GLfloat (*)[4]) rgbaFloat);
- }
- /* clamp to [0,1] and convert float back to chan */
- for (k = 0; k < width; k++) {
- GLint r = (GLint) (rgbaFloat[k][RCOMP] * CHAN_MAXF);
- GLint g = (GLint) (rgbaFloat[k][GCOMP] * CHAN_MAXF);
- GLint b = (GLint) (rgbaFloat[k][BCOMP] * CHAN_MAXF);
- GLint a = (GLint) (rgbaFloat[k][ACOMP] * CHAN_MAXF);
- span->color.rgba[k][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX);
- span->color.rgba[k][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX);
- span->color.rgba[k][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX);
- span->color.rgba[k][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX);
- }
- UNDEFARRAY(rgbaFloat); /* mac 32k limitation */
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width,
+ (GLfloat (*)[4]) rgba);
}
- if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
- span->end = width;
- _swrast_pixel_texture(ctx, span);
- }
-
- if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) {
- (*swrast->Driver.WriteRGBASpan)( ctx, width, destx, dy,
- (const GLchan (*)[4])span->color.rgba, NULL );
- }
- else if (zoom) {
- span->x = destx;
- span->y = dy;
- span->end = width;
- _mesa_write_zoomed_rgba_span(ctx, span,
- (CONST GLchan (*)[4]) span->color.rgba,
- desty);
+ /* Write color span */
+ 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;
- _mesa_write_rgba_span(ctx, span);
+ _swrast_write_rgba_span(ctx, &span);
}
}
- /* Restore pixel source to be the draw buffer (for blending, etc) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
+ span.array->ChanType = CHAN_TYPE; /* restore */
if (overlapping)
- FREE(tmpImage);
+ _mesa_free(tmpImage);
}
-static void copy_ci_pixels( GLcontext *ctx,
- GLint srcx, GLint srcy, GLint width, GLint height,
- GLint destx, GLint desty )
+static void
+copy_ci_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
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 = swrast->span;
+ SWspan span;
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no readbuffer - OK */
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_INDEX;
+
+ 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;
}
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
-
- if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, span);
- if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, span);
-
- /* If read and draw buffer are different we must do buffer switching */
- changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
- || ctx->DrawBuffer != ctx->ReadBuffer;
-
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
-
if (overlapping) {
GLint ssy = sy;
- tmpImage = (GLuint *) MALLOC(width * height * sizeof(GLuint));
+ tmpImage = (GLuint *) _mesa_malloc(width * height * sizeof(GLuint));
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
+ /* read the image */
p = tmpImage;
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- }
for (j = 0; j < height; j++, ssy += stepy) {
- _mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, ssy, p );
+ _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, ssy, p );
p += width;
}
p = tmpImage;
}
for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ /* Get color indexes */
if (overlapping) {
- MEMCPY(span->color.index, p, width * sizeof(GLuint));
+ _mesa_memcpy(span.array->index, p, width * sizeof(GLuint));
p += width;
}
else {
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- }
- _mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, sy,
- span->color.index );
+ _swrast_read_index_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
+ width, srcx, sy, span.array->index );
}
- if (changeBuffer) {
- /* set read buffer back to draw buffer (in case of logicops) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- }
-
- if (shift_or_offset) {
- _mesa_shift_and_offset_ci( ctx, width, span->color.index );
- }
- if (ctx->Pixel.MapColorFlag) {
- _mesa_map_ci( ctx, width, span->color.index );
- }
+ if (ctx->_ImageTransferState)
+ _mesa_apply_ci_transfer_ops(ctx, ctx->_ImageTransferState,
+ width, span.array->index);
- span->x = destx;
- span->y = dy;
- span->end = width;
+ /* write color indexes */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
if (zoom)
- _mesa_write_zoomed_index_span(ctx, span, desty);
+ _swrast_write_zoomed_index_span(ctx, destx, desty, &span);
else
- _mesa_write_index_span(ctx, span);
+ _swrast_write_index_span(ctx, &span);
}
- /* Restore pixel source to be the draw buffer (for blending, etc) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
-
if (overlapping)
- FREE(tmpImage);
+ _mesa_free(tmpImage);
+}
+
+
+/**
+ * Convert floating point Z values to integer Z values with pixel transfer's
+ * Z scale and bias.
+ */
+static void
+scale_and_bias_z(GLcontext *ctx, GLuint width,
+ const GLfloat depth[], GLuint z[])
+{
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ GLuint i;
+
+ 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 {
+ /* 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;
+ }
+ }
}
/*
* TODO: Optimize!!!!
*/
-static void copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
- GLint width, GLint height,
- GLint destx, GLint desty )
+static void
+copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
{
- GLfloat depth[MAX_WIDTH];
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *readRb = fb->_DepthBuffer;
GLfloat *p, *tmpImage;
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 = SWRAST_CONTEXT(ctx)->span;
+ SWspan span;
- INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
-
- if (!ctx->Visual.depthBits) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" );
+ if (!readRb) {
+ /* no readbuffer - OK */
return;
}
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_Z;
+
+ 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;
}
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
-
- _mesa_span_default_color(ctx, span);
- if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, span);
-
if (overlapping) {
GLint ssy = sy;
- tmpImage = (GLfloat *) MALLOC(width * height * sizeof(GLfloat));
+ tmpImage = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
p = tmpImage;
for (j = 0; j < height; j++, ssy += stepy) {
- _mesa_read_depth_span_float(ctx, width, srcx, ssy, p);
+ _swrast_read_depth_span_float(ctx, readRb, width, srcx, ssy, p);
p += width;
}
p = tmpImage;
}
for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ GLfloat depth[MAX_WIDTH];
+ /* get depth values */
if (overlapping) {
- MEMCPY(depth, p, width * sizeof(GLfloat));
+ _mesa_memcpy(depth, p, width * sizeof(GLfloat));
p += width;
}
else {
- _mesa_read_depth_span_float(ctx, width, srcx, sy, depth);
+ _swrast_read_depth_span_float(ctx, readRb, width, srcx, sy, depth);
}
- for (i = 0; i < width; i++) {
- GLfloat d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
- span->zArray[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * ctx->DepthMax);
- }
+ /* apply scale and bias */
+ scale_and_bias_z(ctx, width, depth, span.array->z);
- span->x = destx;
- span->y = dy;
- span->end = width;
- if (ctx->Visual.rgbMode) {
+ /* write depth values */
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ if (fb->Visual.rgbMode) {
if (zoom)
- _mesa_write_zoomed_rgba_span( ctx, span,
- (const GLchan (*)[4])span->color.rgba,
- desty );
+ _swrast_write_zoomed_depth_span(ctx, destx, desty, &span);
else
- _mesa_write_rgba_span(ctx, span);
+ _swrast_write_rgba_span(ctx, &span);
}
else {
if (zoom)
- _mesa_write_zoomed_index_span( ctx, span, desty );
+ _swrast_write_zoomed_depth_span(ctx, destx, desty, &span);
else
- _mesa_write_index_span(ctx, span);
+ _swrast_write_index_span(ctx, &span);
}
}
if (overlapping)
- FREE(tmpImage);
+ _mesa_free(tmpImage);
}
-static void copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
- GLint width, GLint height,
- GLint destx, GLint desty )
+static void
+copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
+ GLint width, GLint height,
+ GLint destx, GLint desty )
{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
GLint sy, dy, stepy;
GLint j;
GLstencil *p, *tmpImage;
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" );
+ 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;
}
- overlapping = regions_overlap(srcx, srcy, destx, desty, width, height,
- ctx->Pixel.ZoomX, ctx->Pixel.ZoomY);
-
if (overlapping) {
GLint ssy = sy;
- tmpImage = (GLstencil *) MALLOC(width * height * sizeof(GLstencil));
+ tmpImage = (GLstencil *) _mesa_malloc(width * height * sizeof(GLstencil));
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
p = tmpImage;
for (j = 0; j < height; j++, ssy += stepy) {
- _mesa_read_stencil_span( ctx, width, srcx, ssy, p );
+ _swrast_read_stencil_span( ctx, rb, width, srcx, ssy, p );
p += width;
}
p = tmpImage;
for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
GLstencil stencil[MAX_WIDTH];
+ /* Get stencil values */
if (overlapping) {
- MEMCPY(stencil, p, width * sizeof(GLstencil));
+ _mesa_memcpy(stencil, p, width * sizeof(GLstencil));
p += width;
}
else {
- _mesa_read_stencil_span( ctx, width, srcx, sy, stencil );
+ _swrast_read_stencil_span( ctx, rb, width, srcx, sy, stencil );
}
- 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) {
- _mesa_write_zoomed_stencil_span( ctx, width, destx, dy, stencil, desty );
+ _swrast_write_zoomed_stencil_span(ctx, destx, desty, width,
+ destx, dy, stencil);
}
else {
- _mesa_write_stencil_span( ctx, width, destx, dy, stencil );
+ _swrast_write_stencil_span( ctx, width, destx, dy, stencil );
}
}
if (overlapping)
- FREE(tmpImage);
+ _mesa_free(tmpImage);
+}
+
+
+/**
+ * This isn't terribly efficient. If a driver really has combined
+ * depth/stencil buffers the driver should implement an optimized
+ * CopyPixels function.
+ */
+static void
+copy_depth_stencil_pixels(GLcontext *ctx,
+ const GLint srcX, const GLint srcY,
+ const GLint width, const GLint height,
+ const GLint destX, const GLint destY)
+{
+ struct gl_renderbuffer *stencilReadRb, *depthReadRb, *depthDrawRb;
+ GLint sy, dy, stepy;
+ GLint j;
+ GLstencil *tempStencilImage = NULL, *stencilPtr = NULL;
+ GLfloat *tempDepthImage = NULL, *depthPtr = NULL;
+ const GLfloat depthScale = ctx->DrawBuffer->_DepthMaxF;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ GLint overlapping;
+
+ depthDrawRb = ctx->DrawBuffer->_DepthBuffer;
+ depthReadRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilReadRb = ctx->ReadBuffer->_StencilBuffer;
+
+ ASSERT(depthDrawRb);
+ ASSERT(depthReadRb);
+ ASSERT(stencilReadRb);
+
+ 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 (!overlapping && 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 (overlapping) {
+ GLint ssy = sy;
+
+ if (stencilMask != 0x0) {
+ tempStencilImage
+ = (GLstencil *) _mesa_malloc(width * height * sizeof(GLstencil));
+ if (!tempStencilImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ return;
+ }
+
+ /* get copy of stencil pixels */
+ stencilPtr = tempStencilImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_stencil_span(ctx, stencilReadRb,
+ width, srcX, ssy, stencilPtr);
+ stencilPtr += width;
+ }
+ stencilPtr = tempStencilImage;
+ }
+
+ if (ctx->Depth.Mask) {
+ tempDepthImage
+ = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat));
+ if (!tempDepthImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels");
+ _mesa_free(tempStencilImage);
+ return;
+ }
+
+ /* get copy of depth pixels */
+ depthPtr = tempDepthImage;
+ for (j = 0; j < height; j++, ssy += stepy) {
+ _swrast_read_depth_span_float(ctx, depthReadRb,
+ width, srcX, ssy, depthPtr);
+ depthPtr += width;
+ }
+ depthPtr = tempDepthImage;
+ }
+ }
+
+ for (j = 0; j < height; j++, sy += stepy, dy += stepy) {
+ if (stencilMask != 0x0) {
+ GLstencil stencil[MAX_WIDTH];
+
+ /* Get stencil values */
+ if (overlapping) {
+ _mesa_memcpy(stencil, stencilPtr, width * sizeof(GLstencil));
+ stencilPtr += width;
+ }
+ else {
+ _swrast_read_stencil_span(ctx, stencilReadRb,
+ width, srcX, sy, stencil);
+ }
+
+ _mesa_apply_stencil_transfer_ops(ctx, width, stencil);
+
+ /* Write values */
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, destX, destY, width,
+ destX, dy, stencil);
+ }
+ else {
+ _swrast_write_stencil_span( ctx, width, destX, dy, stencil );
+ }
+ }
+
+ if (ctx->Depth.Mask) {
+ GLfloat depth[MAX_WIDTH];
+ GLuint zVals32[MAX_WIDTH];
+ GLushort zVals16[MAX_WIDTH];
+ GLvoid *zVals;
+ GLuint zBytes;
+
+ /* get depth values */
+ if (overlapping) {
+ _mesa_memcpy(depth, depthPtr, width * sizeof(GLfloat));
+ depthPtr += width;
+ }
+ else {
+ _swrast_read_depth_span_float(ctx, depthReadRb,
+ width, srcX, sy, depth);
+ }
+
+ /* scale & bias */
+ if (scaleOrBias) {
+ _mesa_scale_and_bias_depth(ctx, width, depth);
+ }
+ /* convert to integer Z values */
+ if (depthDrawRb->DataType == GL_UNSIGNED_SHORT) {
+ GLint k;
+ for (k = 0; k < width; k++)
+ zVals16[k] = (GLushort) (depth[k] * depthScale);
+ zVals = zVals16;
+ zBytes = 2;
+ }
+ else {
+ GLint k;
+ for (k = 0; k < width; k++)
+ zVals32[k] = (GLuint) (depth[k] * depthScale);
+ zVals = zVals32;
+ zBytes = 4;
+ }
+
+ /* Write values */
+ if (zoom) {
+ _swrast_write_zoomed_z_span(ctx, destX, destY, width,
+ destX, dy, zVals);
+ }
+ else {
+ _swrast_put_row(ctx, depthDrawRb, width, destX, dy, zVals, zBytes);
+ }
+ }
+ }
+
+ if (tempStencilImage)
+ _mesa_free(tempStencilImage);
+
+ if (tempDepthImage)
+ _mesa_free(tempDepthImage);
}
+/**
+ * Try to do a fast copy pixels.
+ */
+static GLboolean
+fast_copy_pixels(GLcontext *ctx,
+ GLint srcX, GLint srcY, GLsizei width, GLsizei height,
+ GLint dstX, GLint dstY, GLenum type)
+{
+ struct gl_framebuffer *srcFb = ctx->ReadBuffer;
+ struct gl_framebuffer *dstFb = ctx->DrawBuffer;
+ struct gl_renderbuffer *srcRb, *dstRb;
+ GLint row, yStep;
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask != 0x0 ||
+ ctx->Pixel.ZoomX != 1.0F ||
+ ctx->Pixel.ZoomY != 1.0F ||
+ ctx->_ImageTransferState) {
+ /* can't handle these */
+ return GL_FALSE;
+ }
+ 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->_StencilBuffer;
+ dstRb = dstFb->_StencilBuffer;
+ }
+ else if (type == GL_DEPTH) {
+ srcRb = srcFb->_DepthBuffer;
+ dstRb = dstFb->_DepthBuffer;
+ }
+ 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 and type */
+ if (!srcRb || !dstRb ||
+ srcRb->DataType != dstRb->DataType ||
+ srcRb->_BaseFormat != dstRb->_BaseFormat) {
+ 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;
+ }
+
+ /* overlapping src/dst doesn't matter, just determine Y direction */
+ if (srcY < dstY) {
+ /* top-down max-to-min */
+ srcY = srcY + height - 1;
+ dstY = dstY + height - 1;
+ yStep = -1;
+ }
+ else {
+ /* bottom-up min-to-max */
+ yStep = 1;
+ }
+
+ for (row = 0; row < height; row++) {
+ GLuint temp[MAX_WIDTH][4];
+ srcRb->GetRow(ctx, srcRb, width, srcX, srcY, temp);
+ dstRb->PutRow(ctx, dstRb, width, dstX, dstY, temp, NULL);
+ srcY += yStep;
+ dstY += yStep;
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * 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 )
+ GLint destx, GLint desty, GLenum type )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
RENDER_START(swrast,ctx);
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 );
- }
- else if (type == GL_DEPTH) {
- copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
- }
- else if (type == GL_STENCIL) {
- copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glCopyPixels" );
+ if (!fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty, type)) {
+ switch (type) {
+ case GL_COLOR:
+ if (ctx->Visual.rgbMode) {
+ copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ else {
+ copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ }
+ break;
+ case GL_DEPTH:
+ copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_STENCIL:
+ copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty );
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ copy_depth_stencil_pixels(ctx, srcx, srcy, width, height, destx, desty);
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected type in _swrast_CopyPixels");
+ }
}
RENDER_FINISH(swrast,ctx);
projects / mesa.git / blobdiff