From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c | 801 +++++++++++++++++++++++++ 1 file changed, 801 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c') diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c new file mode 100644 index 000000000..05f81c690 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_copypix.c @@ -0,0 +1,801 @@ +/* + * Mesa 3-D graphics library + * Version: 6.4 + * + * Copyright (C) 1999-2005 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"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of 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. + */ + + +#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 "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. + */ +static GLboolean +regions_overlap(GLint srcx, GLint srcy, + GLint dstx, GLint dsty, + GLint width, GLint height, + GLfloat zoomX, GLfloat zoomY) +{ + if (zoomX == 1.0 && zoomY == 1.0) { + /* no zoom */ + if (srcx >= dstx + width || (srcx + width <= dstx)) { + return GL_FALSE; + } + else if (srcy < dsty) { /* this is OK */ + return GL_FALSE; + } + else if (srcy > dsty + height) { + return GL_FALSE; + } + else { + return GL_TRUE; + } + } + else { + /* add one pixel of slop when zooming, just to be safe */ + if ((srcx > dstx + (width * zoomX) + 1) || (srcx + width + 1 < dstx)) { + return GL_FALSE; + } + else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) { + return GL_FALSE; + } + else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) { + return GL_FALSE; + } + else { + return GL_TRUE; + } + } +} + + +/** + * 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 (swrast->_FogEnabled) + _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) { + 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, + 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; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; + GLint overlapping; + const GLuint transferOps = ctx->_ImageTransferState; + struct sw_span 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; + } + + /* Determine if copy should be done 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 (swrast->_FogEnabled) + _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; + + if (overlapping) { + GLint ssy = sy; + tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 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 */ + p = tmpImage; + for (j = 0; j < height; j++, ssy += stepy) { + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, srcx, ssy, (GLchan (*)[4]) 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 */ + if (overlapping) { + /* get from buffered image */ + ASSERT(width < MAX_WIDTH); + MEMCPY(span.array->rgba, p, width * sizeof(GLchan) * 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); + } + + 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); + } + + /* Write color span */ + if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) { + 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); + } + } + + if (overlapping) + FREE(tmpImage); +} + + +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; + + 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 (srcyDrawBuffer == 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 (swrast->_FogEnabled) + _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; + + 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; + } + } + 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 ); + } + + /* 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, + GLint width, GLint height, + GLint destx, GLint desty ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF; + struct gl_renderbuffer *readRb + = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; + GLfloat *p, *tmpImage; + GLint sy, dy, stepy; + GLint i, j; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; + GLint overlapping; + struct sw_span span; + + if (!readRb) { + /* no readbuffer - OK */ + return; + } + + INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z); + + if (!ctx->Visual.depthBits) { + _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" ); + return; + } + + /* Determine if copy should be bottom-to-top or top-to-bottom */ + if (srcyDrawBuffer == 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 (swrast->_FogEnabled) + _swrast_span_default_fog(ctx, &span); + + if (overlapping) { + GLint ssy = sy; + tmpImage = (GLfloat *) 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) { + _swrast_read_depth_span_float(ctx, readRb, width, srcx, ssy, p); + p += width; + } + p = tmpImage; + } + else { + tmpImage = NULL; /* silence compiler warning */ + p = NULL; + } + + 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)); + p += width; + } + else { + _swrast_read_depth_span_float(ctx, readRb, width, srcx, sy, depth); + } + + /* apply scale and bias */ + for (i = 0; i < width; i++) { + GLfloat d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias; + span.array->z[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * depthMax); + } + + /* 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 (overlapping) + FREE(tmpImage); +} + + + +static void +copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy, + GLint width, GLint height, + GLint destx, GLint desty ) +{ + struct gl_renderbuffer *rb + = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; + 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" ); + return; + } + + if (!rb) { + /* no readbuffer - OK */ + return; + } + + /* 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 (overlapping) { + GLint ssy = sy; + tmpImage = (GLstencil *) 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) { + _swrast_read_stencil_span( ctx, rb, width, srcx, ssy, p ); + p += width; + } + p = tmpImage; + } + else { + tmpImage = NULL; /* silence compiler warning */ + p = NULL; + } + + 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)); + 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 ); + } + + /* Write stencil values */ + if (zoom) { + _swrast_write_zoomed_stencil_span( ctx, width, destx, dy, + stencil, desty, 0 ); + } + else { + _swrast_write_stencil_span( ctx, width, destx, dy, stencil ); + } + } + + if (overlapping) + FREE(tmpImage); +} + + + +void +_swrast_CopyPixels( GLcontext *ctx, + GLint srcx, GLint srcy, GLsizei width, GLsizei height, + 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" ); + } + + RENDER_FINISH(swrast,ctx); +} -- cgit v1.2.3