From d41bc08d1ae8c4784c09d8977816c0fadab1ba52 Mon Sep 17 00:00:00 2001 From: marha Date: Thu, 17 Nov 2011 16:37:26 +0100 Subject: xserver mesa git update 17 nov 2011 --- mesalib/src/mesa/swrast/s_copypix.c | 1440 +++++++++++++++++------------------ 1 file changed, 720 insertions(+), 720 deletions(-) (limited to 'mesalib/src/mesa/swrast/s_copypix.c') diff --git a/mesalib/src/mesa/swrast/s_copypix.c b/mesalib/src/mesa/swrast/s_copypix.c index e249e4ad5..3ba31f22c 100644 --- a/mesalib/src/mesa/swrast/s_copypix.c +++ b/mesalib/src/mesa/swrast/s_copypix.c @@ -1,720 +1,720 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * 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"), - * 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 "main/glheader.h" -#include "main/context.h" -#include "main/colormac.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_span.h" -#include "s_stencil.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, - 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 + ((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 { - return GL_TRUE; - } - } -} - - -/** - * RGBA copypixels - */ -static void -copy_rgba_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, GLint destx, GLint desty) -{ - GLfloat *tmpImage, *p; - GLint sy, dy, stepy, row; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - GLint overlapping; - GLuint transferOps = ctx->_ImageTransferState; - SWspan span; - - if (!ctx->ReadBuffer->_ColorReadBuffer) { - /* 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 done 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; - } - - 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) { - tmpImage = (GLfloat *) 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; - 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; - } - else { - tmpImage = NULL; /* silence compiler warnings */ - p = NULL; - } - - 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(rgba, p, width * sizeof(GLfloat) * 4); - p += width * 4; - } - else { - /* get from framebuffer */ - _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, - width, srcx, sy, GL_FLOAT, rgba ); - } - - if (transferOps) { - _mesa_apply_rgba_transfer_ops(ctx, transferOps, width, - (GLfloat (*)[4]) rgba); - } - - /* 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 { - _swrast_write_rgba_span(ctx, &span); - } - } - - span.array->ChanType = CHAN_TYPE; /* restore */ - - if (overlapping) - 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(struct gl_context *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( struct gl_context *ctx, GLint srcx, GLint srcy, - GLint width, GLint height, - GLint destx, GLint desty ) -{ - struct gl_framebuffer *fb = ctx->ReadBuffer; - struct gl_renderbuffer *readRb = fb->_DepthBuffer; - GLfloat *p, *tmpImage; - GLint sy, dy, stepy; - GLint j; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; - GLint overlapping; - SWspan span; - - 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 (!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; - 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 */ - scale_and_bias_z(ctx, width, depth, span.array->z); - - /* write depth values */ - span.x = destx; - span.y = dy; - span.end = width; - if (zoom) - _swrast_write_zoomed_depth_span(ctx, destx, desty, &span); - else - _swrast_write_rgba_span(ctx, &span); - } - - if (overlapping) - free(tmpImage); -} - - - -static void -copy_stencil_pixels( struct gl_context *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; - GLint overlapping; - - 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 (!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; - 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 ); - } - - _mesa_apply_stencil_transfer_ops(ctx, width, stencil); - - /* Write stencil 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 (overlapping) - 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(struct gl_context *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 *) 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 *) malloc(width * height * sizeof(GLfloat)); - if (!tempDepthImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); - 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) { - 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) { - 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) - free(tempStencilImage); - - if (tempDepthImage) - free(tempDepthImage); -} - - - -/** - * Try to do a fast copy pixels. - */ -static GLboolean -fast_copy_pixels(struct gl_context *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( struct gl_context *ctx, - GLint srcx, GLint srcy, GLsizei width, GLsizei height, - GLint destx, GLint desty, GLenum type ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - swrast_render_start(ctx); - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't copy */ - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - if (!fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty, 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 ); - 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"); - } - } - - swrast_render_finish(ctx); -} +/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * 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"), + * 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 "main/glheader.h" +#include "main/context.h" +#include "main/colormac.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_span.h" +#include "s_stencil.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, + 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 + ((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 { + return GL_TRUE; + } + } +} + + +/** + * RGBA copypixels + */ +static void +copy_rgba_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, + GLint width, GLint height, GLint destx, GLint desty) +{ + GLfloat *tmpImage, *p; + GLint sy, dy, stepy, row; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; + GLint overlapping; + GLuint transferOps = ctx->_ImageTransferState; + SWspan span; + + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* 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 done 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; + } + + 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) { + tmpImage = (GLfloat *) 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; + 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; + } + else { + tmpImage = NULL; /* silence compiler warnings */ + p = NULL; + } + + 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(rgba, p, width * sizeof(GLfloat) * 4); + p += width * 4; + } + else { + /* get from framebuffer */ + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, srcx, sy, GL_FLOAT, rgba ); + } + + if (transferOps) { + _mesa_apply_rgba_transfer_ops(ctx, transferOps, width, + (GLfloat (*)[4]) rgba); + } + + /* 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 { + _swrast_write_rgba_span(ctx, &span); + } + } + + span.array->ChanType = CHAN_TYPE; /* restore */ + + if (overlapping) + 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(struct gl_context *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( struct gl_context *ctx, GLint srcx, GLint srcy, + GLint width, GLint height, + GLint destx, GLint desty ) +{ + struct gl_framebuffer *fb = ctx->ReadBuffer; + struct gl_renderbuffer *readRb = fb->_DepthBuffer; + GLfloat *p, *tmpImage; + GLint sy, dy, stepy; + GLint j; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; + GLint overlapping; + SWspan span; + + 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 (!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; + 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 */ + scale_and_bias_z(ctx, width, depth, span.array->z); + + /* write depth values */ + span.x = destx; + span.y = dy; + span.end = width; + if (zoom) + _swrast_write_zoomed_depth_span(ctx, destx, desty, &span); + else + _swrast_write_rgba_span(ctx, &span); + } + + if (overlapping) + free(tmpImage); +} + + + +static void +copy_stencil_pixels( struct gl_context *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; + GLubyte *p, *tmpImage; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; + GLint overlapping; + + 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 (!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; + tmpImage = (GLubyte *) malloc(width * height * sizeof(GLubyte)); + 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) { + GLubyte stencil[MAX_WIDTH]; + + /* Get stencil values */ + if (overlapping) { + memcpy(stencil, p, width * sizeof(GLubyte)); + p += width; + } + else { + _swrast_read_stencil_span( ctx, rb, width, srcx, sy, stencil ); + } + + _mesa_apply_stencil_transfer_ops(ctx, width, stencil); + + /* Write stencil 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 (overlapping) + 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(struct gl_context *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; + GLubyte *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 + = (GLubyte *) malloc(width * height * sizeof(GLubyte)); + 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 *) malloc(width * height * sizeof(GLfloat)); + if (!tempDepthImage) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); + 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) { + GLubyte stencil[MAX_WIDTH]; + + /* Get stencil values */ + if (overlapping) { + memcpy(stencil, stencilPtr, width * sizeof(GLubyte)); + 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) { + 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) + free(tempStencilImage); + + if (tempDepthImage) + free(tempDepthImage); +} + + + +/** + * Try to do a fast copy pixels. + */ +static GLboolean +fast_copy_pixels(struct gl_context *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( struct gl_context *ctx, + GLint srcx, GLint srcy, GLsizei width, GLsizei height, + GLint destx, GLint desty, GLenum type ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + swrast_render_start(ctx); + + if (!_mesa_check_conditional_render(ctx)) + return; /* don't copy */ + + if (swrast->NewState) + _swrast_validate_derived( ctx ); + + if (!fast_copy_pixels(ctx, srcx, srcy, width, height, destx, desty, 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 ); + 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"); + } + } + + swrast_render_finish(ctx); +} -- cgit v1.2.3