| /* |
| * 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 "glheader.h" |
| #include "bufferobj.h" |
| #include "context.h" |
| #include "convolve.h" |
| #include "image.h" |
| #include "macros.h" |
| #include "imports.h" |
| #include "pixel.h" |
| #include "state.h" |
| |
| #include "s_context.h" |
| #include "s_drawpix.h" |
| #include "s_span.h" |
| #include "s_stencil.h" |
| #include "s_zoom.h" |
| |
| |
| |
| /** |
| * Try to do a fast and simple RGB(a) glDrawPixels. |
| * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead |
| */ |
| static GLboolean |
| fast_draw_rgba_pixels(GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *userUnpack, |
| const GLvoid *pixels) |
| { |
| const GLint imgX = x, imgY = y; |
| struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; |
| GLenum rbType; |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| SWspan span; |
| GLboolean simpleZoom; |
| GLint yStep; /* +1 or -1 */ |
| struct gl_pixelstore_attrib unpack; |
| GLint destX, destY, drawWidth, drawHeight; /* post clipping */ |
| |
| if (!rb) |
| return GL_TRUE; /* no-op */ |
| |
| rbType = rb->DataType; |
| |
| if ((swrast->_RasterMask & ~CLIP_BIT) || |
| ctx->Texture._EnabledCoordUnits || |
| userUnpack->SwapBytes || |
| ctx->_ImageTransferState) { |
| /* can't handle any of those conditions */ |
| return GL_FALSE; |
| } |
| |
| INIT_SPAN(span, GL_BITMAP); |
| span.arrayMask = SPAN_RGBA; |
| span.arrayAttribs = FRAG_BIT_COL0; |
| _swrast_span_default_attribs(ctx, &span); |
| |
| /* copy input params since clipping may change them */ |
| unpack = *userUnpack; |
| destX = x; |
| destY = y; |
| drawWidth = width; |
| drawHeight = height; |
| |
| /* check for simple zooming and clipping */ |
| if (ctx->Pixel.ZoomX == 1.0F && |
| (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) { |
| if (!_mesa_clip_drawpixels(ctx, &destX, &destY, |
| &drawWidth, &drawHeight, &unpack)) { |
| /* image was completely clipped: no-op, all done */ |
| return GL_TRUE; |
| } |
| simpleZoom = GL_TRUE; |
| yStep = (GLint) ctx->Pixel.ZoomY; |
| ASSERT(yStep == 1 || yStep == -1); |
| } |
| else { |
| /* non-simple zooming */ |
| simpleZoom = GL_FALSE; |
| yStep = 1; |
| if (unpack.RowLength == 0) |
| unpack.RowLength = width; |
| } |
| |
| /* |
| * Ready to draw! |
| */ |
| |
| if (format == GL_RGBA && type == rbType) { |
| const GLubyte *src |
| = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width, |
| height, format, type, 0, 0); |
| const GLint srcStride = _mesa_image_row_stride(&unpack, width, |
| format, type); |
| if (simpleZoom) { |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL); |
| src += srcStride; |
| destY += yStep; |
| } |
| } |
| else { |
| /* with zooming */ |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| span.x = destX; |
| span.y = destY + row; |
| span.end = drawWidth; |
| span.array->ChanType = rbType; |
| _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src); |
| src += srcStride; |
| } |
| span.array->ChanType = CHAN_TYPE; |
| } |
| return GL_TRUE; |
| } |
| |
| if (format == GL_RGB && type == rbType) { |
| const GLubyte *src |
| = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width, |
| height, format, type, 0, 0); |
| const GLint srcStride = _mesa_image_row_stride(&unpack, width, |
| format, type); |
| if (simpleZoom) { |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL); |
| src += srcStride; |
| destY += yStep; |
| } |
| } |
| else { |
| /* with zooming */ |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| span.x = destX; |
| span.y = destY; |
| span.end = drawWidth; |
| span.array->ChanType = rbType; |
| _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src); |
| src += srcStride; |
| destY++; |
| } |
| span.array->ChanType = CHAN_TYPE; |
| } |
| return GL_TRUE; |
| } |
| |
| /* Remaining cases haven't been tested with alignment != 1 */ |
| if (userUnpack->Alignment != 1) |
| return GL_FALSE; |
| |
| if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) { |
| const GLchan *src = (const GLchan *) pixels |
| + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels); |
| if (simpleZoom) { |
| /* no zooming */ |
| GLint row; |
| ASSERT(drawWidth <= MAX_WIDTH); |
| for (row = 0; row < drawHeight; row++) { |
| GLchan rgb[MAX_WIDTH][3]; |
| GLint i; |
| for (i = 0;i<drawWidth;i++) { |
| rgb[i][0] = src[i]; |
| rgb[i][1] = src[i]; |
| rgb[i][2] = src[i]; |
| } |
| rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL); |
| src += unpack.RowLength; |
| destY += yStep; |
| } |
| } |
| else { |
| /* with zooming */ |
| GLint row; |
| ASSERT(drawWidth <= MAX_WIDTH); |
| for (row = 0; row < drawHeight; row++) { |
| GLchan rgb[MAX_WIDTH][3]; |
| GLint i; |
| for (i = 0;i<drawWidth;i++) { |
| rgb[i][0] = src[i]; |
| rgb[i][1] = src[i]; |
| rgb[i][2] = src[i]; |
| } |
| span.x = destX; |
| span.y = destY; |
| span.end = drawWidth; |
| _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb); |
| src += unpack.RowLength; |
| destY++; |
| } |
| } |
| return GL_TRUE; |
| } |
| |
| if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) { |
| const GLchan *src = (const GLchan *) pixels |
| + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2; |
| if (simpleZoom) { |
| GLint row; |
| ASSERT(drawWidth <= MAX_WIDTH); |
| for (row = 0; row < drawHeight; row++) { |
| GLint i; |
| const GLchan *ptr = src; |
| for (i = 0;i<drawWidth;i++) { |
| span.array->rgba[i][0] = *ptr; |
| span.array->rgba[i][1] = *ptr; |
| span.array->rgba[i][2] = *ptr++; |
| span.array->rgba[i][3] = *ptr++; |
| } |
| rb->PutRow(ctx, rb, drawWidth, destX, destY, |
| span.array->rgba, NULL); |
| src += unpack.RowLength*2; |
| destY += yStep; |
| } |
| } |
| else { |
| /* with zooming */ |
| GLint row; |
| ASSERT(drawWidth <= MAX_WIDTH); |
| for (row = 0; row < drawHeight; row++) { |
| const GLchan *ptr = src; |
| GLint i; |
| for (i = 0;i<drawWidth;i++) { |
| span.array->rgba[i][0] = *ptr; |
| span.array->rgba[i][1] = *ptr; |
| span.array->rgba[i][2] = *ptr++; |
| span.array->rgba[i][3] = *ptr++; |
| } |
| span.x = destX; |
| span.y = destY; |
| span.end = drawWidth; |
| _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, |
| span.array->rgba); |
| src += unpack.RowLength*2; |
| destY++; |
| } |
| } |
| return GL_TRUE; |
| } |
| |
| if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) { |
| const GLubyte *src = (const GLubyte *) pixels |
| + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels; |
| if (ctx->Visual.rgbMode && rbType == GL_UNSIGNED_BYTE) { |
| /* convert ubyte/CI data to ubyte/RGBA */ |
| if (simpleZoom) { |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| ASSERT(drawWidth <= MAX_WIDTH); |
| _mesa_map_ci8_to_rgba8(ctx, drawWidth, src, |
| span.array->rgba8); |
| rb->PutRow(ctx, rb, drawWidth, destX, destY, |
| span.array->rgba8, NULL); |
| src += unpack.RowLength; |
| destY += yStep; |
| } |
| } |
| else { |
| /* ubyte/CI to ubyte/RGBA with zooming */ |
| GLint row; |
| for (row = 0; row < drawHeight; row++) { |
| ASSERT(drawWidth <= MAX_WIDTH); |
| _mesa_map_ci8_to_rgba8(ctx, drawWidth, src, |
| span.array->rgba8); |
| span.x = destX; |
| span.y = destY; |
| span.end = drawWidth; |
| _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, |
| span.array->rgba8); |
| src += unpack.RowLength; |
| destY++; |
| } |
| } |
| return GL_TRUE; |
| } |
| else if (!ctx->Visual.rgbMode && rbType == GL_UNSIGNED_INT) { |
| /* write CI data to CI frame buffer */ |
| GLint row; |
| if (simpleZoom) { |
| for (row = 0; row < drawHeight; row++) { |
| GLuint index32[MAX_WIDTH]; |
| GLint col; |
| for (col = 0; col < drawWidth; col++) |
| index32[col] = src[col]; |
| rb->PutRow(ctx, rb, drawWidth, destX, destY, index32, NULL); |
| src += unpack.RowLength; |
| destY += yStep; |
| } |
| return GL_TRUE; |
| } |
| } |
| } |
| |
| /* can't handle this pixel format and/or data type */ |
| return GL_FALSE; |
| } |
| |
| |
| |
| /* |
| * Draw color index image. |
| */ |
| static void |
| draw_index_pixels( GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLint imgX = x, imgY = y; |
| const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0; |
| GLint row, skipPixels; |
| SWspan span; |
| |
| INIT_SPAN(span, GL_BITMAP); |
| span.arrayMask = SPAN_INDEX; |
| _swrast_span_default_attribs(ctx, &span); |
| |
| /* |
| * General solution |
| */ |
| skipPixels = 0; |
| while (skipPixels < width) { |
| const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); |
| ASSERT(spanWidth <= MAX_WIDTH); |
| for (row = 0; row < height; row++) { |
| const GLvoid *source = _mesa_image_address2d(unpack, pixels, |
| width, height, |
| GL_COLOR_INDEX, type, |
| row, skipPixels); |
| _mesa_unpack_index_span(ctx, spanWidth, GL_UNSIGNED_INT, |
| span.array->index, type, source, unpack, |
| ctx->_ImageTransferState); |
| |
| /* These may get changed during writing/clipping */ |
| span.x = x + skipPixels; |
| span.y = y + row; |
| span.end = spanWidth; |
| |
| if (zoom) |
| _swrast_write_zoomed_index_span(ctx, imgX, imgY, &span); |
| else |
| _swrast_write_index_span(ctx, &span); |
| } |
| skipPixels += spanWidth; |
| } |
| } |
| |
| |
| |
| /* |
| * Draw stencil image. |
| */ |
| static void |
| draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| GLint skipPixels; |
| |
| /* if width > MAX_WIDTH, have to process image in chunks */ |
| skipPixels = 0; |
| while (skipPixels < width) { |
| const GLint spanX = x + skipPixels; |
| const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); |
| GLint row; |
| for (row = 0; row < height; row++) { |
| const GLint spanY = y + row; |
| GLstencil values[MAX_WIDTH]; |
| GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte)) |
| ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT; |
| const GLvoid *source = _mesa_image_address2d(unpack, pixels, |
| width, height, |
| GL_COLOR_INDEX, type, |
| row, skipPixels); |
| _mesa_unpack_stencil_span(ctx, spanWidth, destType, values, |
| type, source, unpack, |
| ctx->_ImageTransferState); |
| if (zoom) { |
| _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth, |
| spanX, spanY, values); |
| } |
| else { |
| _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values); |
| } |
| } |
| skipPixels += spanWidth; |
| } |
| } |
| |
| |
| /* |
| * Draw depth image. |
| */ |
| static void |
| draw_depth_pixels( GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLboolean scaleOrBias |
| = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| SWspan span; |
| |
| INIT_SPAN(span, GL_BITMAP); |
| span.arrayMask = SPAN_Z; |
| _swrast_span_default_attribs(ctx, &span); |
| |
| if (type == GL_UNSIGNED_SHORT |
| && ctx->DrawBuffer->Visual.depthBits == 16 |
| && !scaleOrBias |
| && !zoom |
| && ctx->Visual.rgbMode |
| && width <= MAX_WIDTH |
| && !unpack->SwapBytes) { |
| /* Special case: directly write 16-bit depth values */ |
| GLint row; |
| for (row = 0; row < height; row++) { |
| const GLushort *zSrc = (const GLushort *) |
| _mesa_image_address2d(unpack, pixels, width, height, |
| GL_DEPTH_COMPONENT, type, row, 0); |
| GLint i; |
| for (i = 0; i < width; i++) |
| span.array->z[i] = zSrc[i]; |
| span.x = x; |
| span.y = y + row; |
| span.end = width; |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| else if (type == GL_UNSIGNED_INT |
| && !scaleOrBias |
| && !zoom |
| && ctx->Visual.rgbMode |
| && width <= MAX_WIDTH |
| && !unpack->SwapBytes) { |
| /* Special case: shift 32-bit values down to Visual.depthBits */ |
| const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits; |
| GLint row; |
| for (row = 0; row < height; row++) { |
| const GLuint *zSrc = (const GLuint *) |
| _mesa_image_address2d(unpack, pixels, width, height, |
| GL_DEPTH_COMPONENT, type, row, 0); |
| if (shift == 0) { |
| _mesa_memcpy(span.array->z, zSrc, width * sizeof(GLuint)); |
| } |
| else { |
| GLint col; |
| for (col = 0; col < width; col++) |
| span.array->z[col] = zSrc[col] >> shift; |
| } |
| span.x = x; |
| span.y = y + row; |
| span.end = width; |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| else { |
| /* General case */ |
| const GLuint depthMax = ctx->DrawBuffer->_DepthMax; |
| GLint skipPixels = 0; |
| |
| /* in case width > MAX_WIDTH do the copy in chunks */ |
| while (skipPixels < width) { |
| const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); |
| GLint row; |
| ASSERT(span.end <= MAX_WIDTH); |
| for (row = 0; row < height; row++) { |
| const GLvoid *zSrc = _mesa_image_address2d(unpack, |
| pixels, width, height, |
| GL_DEPTH_COMPONENT, type, |
| row, skipPixels); |
| |
| /* Set these for each row since the _swrast_write_* function may |
| * change them while clipping. |
| */ |
| span.x = x + skipPixels; |
| span.y = y + row; |
| span.end = spanWidth; |
| |
| _mesa_unpack_depth_span(ctx, spanWidth, |
| GL_UNSIGNED_INT, span.array->z, depthMax, |
| type, zSrc, unpack); |
| if (zoom) { |
| _swrast_write_zoomed_depth_span(ctx, x, y, &span); |
| } |
| else if (ctx->Visual.rgbMode) { |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| else { |
| _swrast_write_index_span(ctx, &span); |
| } |
| } |
| skipPixels += spanWidth; |
| } |
| } |
| } |
| |
| |
| |
| /** |
| * Draw RGBA image. |
| */ |
| static void |
| draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLint imgX = x, imgY = y; |
| const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0; |
| GLfloat *convImage = NULL; |
| GLbitfield transferOps = ctx->_ImageTransferState; |
| SWspan span; |
| |
| /* Try an optimized glDrawPixels first */ |
| if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type, |
| unpack, pixels)) { |
| return; |
| } |
| |
| INIT_SPAN(span, GL_BITMAP); |
| _swrast_span_default_attribs(ctx, &span); |
| span.arrayMask = SPAN_RGBA; |
| span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */ |
| |
| if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { |
| /* Convolution has to be handled specially. We'll create an |
| * intermediate image, applying all pixel transfer operations |
| * up to convolution. Then we'll convolve the image. Then |
| * we'll proceed with the rest of the transfer operations and |
| * rasterize the image. |
| */ |
| GLint row; |
| GLfloat *dest, *tmpImage; |
| |
| tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat)); |
| if (!tmpImage) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat)); |
| if (!convImage) { |
| _mesa_free(tmpImage); |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| /* Unpack the image and apply transfer ops up to convolution */ |
| dest = tmpImage; |
| for (row = 0; row < height; row++) { |
| const GLvoid *source = _mesa_image_address2d(unpack, |
| pixels, width, height, format, type, row, 0); |
| _mesa_unpack_color_span_float(ctx, width, GL_RGBA, (GLfloat *) dest, |
| format, type, source, unpack, |
| transferOps & IMAGE_PRE_CONVOLUTION_BITS); |
| dest += width * 4; |
| } |
| |
| /* 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); |
| } |
| _mesa_free(tmpImage); |
| |
| /* continue transfer ops and draw the convolved image */ |
| unpack = &ctx->DefaultPacking; |
| pixels = convImage; |
| format = GL_RGBA; |
| type = GL_FLOAT; |
| transferOps &= IMAGE_POST_CONVOLUTION_BITS; |
| } |
| else if (ctx->Pixel.Convolution1DEnabled) { |
| /* we only want to apply 1D convolution to glTexImage1D */ |
| transferOps &= ~(IMAGE_CONVOLUTION_BIT | |
| IMAGE_POST_CONVOLUTION_SCALE_BIAS); |
| } |
| |
| if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 && |
| ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT && |
| ctx->Color.ClampFragmentColor != GL_FALSE) { |
| /* need to clamp colors before applying fragment ops */ |
| transferOps |= IMAGE_CLAMP_BIT; |
| } |
| |
| /* |
| * General solution |
| */ |
| { |
| const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) |
| || (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink); |
| const GLbitfield interpMask = span.interpMask; |
| const GLbitfield arrayMask = span.arrayMask; |
| const GLint srcStride |
| = _mesa_image_row_stride(unpack, width, format, type); |
| GLint skipPixels = 0; |
| /* use span array for temp color storage */ |
| GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0]; |
| |
| /* if the span is wider than MAX_WIDTH we have to do it in chunks */ |
| while (skipPixels < width) { |
| const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); |
| const GLubyte *source |
| = (const GLubyte *) _mesa_image_address2d(unpack, pixels, |
| width, height, format, |
| type, 0, skipPixels); |
| GLint row; |
| |
| for (row = 0; row < height; row++) { |
| /* get image row as float/RGBA */ |
| _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba, |
| format, type, source, unpack, |
| transferOps); |
| /* draw the span */ |
| if (!sink) { |
| /* Set these for each row since the _swrast_write_* functions |
| * may change them while clipping/rendering. |
| */ |
| span.array->ChanType = GL_FLOAT; |
| span.x = x + skipPixels; |
| span.y = y + row; |
| span.end = spanWidth; |
| span.arrayMask = arrayMask; |
| span.interpMask = interpMask; |
| if (zoom) { |
| _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba); |
| } |
| else { |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| |
| source += srcStride; |
| } /* for row */ |
| |
| skipPixels += spanWidth; |
| } /* while skipPixels < width */ |
| |
| /* XXX this is ugly/temporary, to undo above change */ |
| span.array->ChanType = CHAN_TYPE; |
| } |
| |
| if (convImage) { |
| _mesa_free(convImage); |
| } |
| } |
| |
| |
| /** |
| * This is a bit different from drawing GL_DEPTH_COMPONENT pixels. |
| * The only per-pixel operations that apply are depth scale/bias, |
| * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK, |
| * and pixel zoom. |
| * Also, only the depth buffer and stencil buffers are touched, not the |
| * color buffer(s). |
| */ |
| static void |
| draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLint imgX = x, imgY = y; |
| const GLboolean scaleOrBias |
| = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; |
| const GLuint depthMax = ctx->DrawBuffer->_DepthMax; |
| const GLuint stencilMask = ctx->Stencil.WriteMask[0]; |
| const GLuint stencilType = (STENCIL_BITS == 8) ? |
| GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT; |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| struct gl_renderbuffer *depthRb, *stencilRb; |
| struct gl_pixelstore_attrib clippedUnpack = *unpack; |
| |
| if (!zoom) { |
| if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, |
| &clippedUnpack)) { |
| /* totally clipped */ |
| return; |
| } |
| } |
| |
| depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; |
| stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; |
| ASSERT(depthRb); |
| ASSERT(stencilRb); |
| |
| if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && |
| stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT && |
| depthRb == stencilRb && |
| !scaleOrBias && |
| !zoom && |
| ctx->Depth.Mask && |
| (stencilMask & 0xff) == 0xff) { |
| /* This is the ideal case. |
| * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer. |
| * Plus, no pixel transfer ops, zooming, or masking needed. |
| */ |
| GLint i; |
| for (i = 0; i < height; i++) { |
| const GLuint *src = (const GLuint *) |
| _mesa_image_address2d(&clippedUnpack, pixels, width, height, |
| GL_DEPTH_STENCIL_EXT, type, i, 0); |
| depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL); |
| } |
| } |
| else { |
| /* sub-optimal cases: |
| * Separate depth/stencil buffers, or pixel transfer ops required. |
| */ |
| /* XXX need to handle very wide images (skippixels) */ |
| GLint i; |
| |
| depthRb = ctx->DrawBuffer->_DepthBuffer; |
| stencilRb = ctx->DrawBuffer->_StencilBuffer; |
| |
| for (i = 0; i < height; i++) { |
| const GLuint *depthStencilSrc = (const GLuint *) |
| _mesa_image_address2d(&clippedUnpack, pixels, width, height, |
| GL_DEPTH_STENCIL_EXT, type, i, 0); |
| |
| if (ctx->Depth.Mask) { |
| if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) { |
| /* fast path 24-bit zbuffer */ |
| GLuint zValues[MAX_WIDTH]; |
| GLint j; |
| ASSERT(depthRb->DataType == GL_UNSIGNED_INT); |
| for (j = 0; j < width; j++) { |
| zValues[j] = depthStencilSrc[j] >> 8; |
| } |
| if (zoom) |
| _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, |
| x, y + i, zValues); |
| else |
| depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); |
| } |
| else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) { |
| /* fast path 16-bit zbuffer */ |
| GLushort zValues[MAX_WIDTH]; |
| GLint j; |
| ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT); |
| for (j = 0; j < width; j++) { |
| zValues[j] = depthStencilSrc[j] >> 16; |
| } |
| if (zoom) |
| _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, |
| x, y + i, zValues); |
| else |
| depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); |
| } |
| else { |
| /* general case */ |
| GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */ |
| _mesa_unpack_depth_span(ctx, width, |
| depthRb->DataType, zValues, depthMax, |
| type, depthStencilSrc, &clippedUnpack); |
| if (zoom) { |
| _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x, |
| y + i, zValues); |
| } |
| else { |
| depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL); |
| } |
| } |
| } |
| |
| if (stencilMask != 0x0) { |
| GLstencil stencilValues[MAX_WIDTH]; |
| /* get stencil values, with shift/offset/mapping */ |
| _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues, |
| type, depthStencilSrc, &clippedUnpack, |
| ctx->_ImageTransferState); |
| if (zoom) |
| _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width, |
| x, y + i, stencilValues); |
| else |
| _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues); |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * Execute software-based glDrawPixels. |
| * By time we get here, all error checking will have been done. |
| */ |
| void |
| _swrast_DrawPixels( GLcontext *ctx, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| |
| RENDER_START(swrast,ctx); |
| |
| if (ctx->NewState) |
| _mesa_update_state(ctx); |
| |
| if (swrast->NewState) |
| _swrast_validate_derived( ctx ); |
| |
| pixels = _mesa_map_drawpix_pbo(ctx, unpack, pixels); |
| if (!pixels) { |
| RENDER_FINISH(swrast,ctx); |
| return; |
| } |
| |
| switch (format) { |
| case GL_STENCIL_INDEX: |
| draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels ); |
| break; |
| case GL_DEPTH_COMPONENT: |
| draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels ); |
| break; |
| case GL_COLOR_INDEX: |
| if (ctx->Visual.rgbMode) |
| draw_rgba_pixels(ctx, x,y, width, height, format, type, unpack, pixels); |
| else |
| draw_index_pixels(ctx, x, y, width, height, type, unpack, pixels); |
| break; |
| case GL_RED: |
| case GL_GREEN: |
| case GL_BLUE: |
| case GL_ALPHA: |
| case GL_LUMINANCE: |
| case GL_LUMINANCE_ALPHA: |
| case GL_RGB: |
| case GL_BGR: |
| case GL_RGBA: |
| case GL_BGRA: |
| case GL_ABGR_EXT: |
| draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels); |
| break; |
| case GL_DEPTH_STENCIL_EXT: |
| draw_depth_stencil_pixels(ctx, x, y, width, height, |
| type, unpack, pixels); |
| break; |
| default: |
| _mesa_problem(ctx, "unexpected format in _swrast_DrawPixels"); |
| /* don't return yet, clean-up */ |
| } |
| |
| RENDER_FINISH(swrast,ctx); |
| |
| _mesa_unmap_drapix_pbo(ctx, unpack); |
| } |
| |
| |
| |
| #if 0 /* experimental */ |
| /* |
| * Execute glDrawDepthPixelsMESA(). |
| */ |
| void |
| _swrast_DrawDepthPixelsMESA( GLcontext *ctx, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum colorFormat, GLenum colorType, |
| const GLvoid *colors, |
| GLenum depthType, const GLvoid *depths, |
| const struct gl_pixelstore_attrib *unpack ) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| |
| if (swrast->NewState) |
| _swrast_validate_derived( ctx ); |
| |
| RENDER_START(swrast,ctx); |
| |
| switch (colorFormat) { |
| case GL_COLOR_INDEX: |
| if (ctx->Visual.rgbMode) |
| draw_rgba_pixels(ctx, x,y, width, height, colorFormat, colorType, |
| unpack, colors); |
| else |
| draw_index_pixels(ctx, x, y, width, height, colorType, |
| unpack, colors); |
| break; |
| case GL_RED: |
| case GL_GREEN: |
| case GL_BLUE: |
| case GL_ALPHA: |
| case GL_LUMINANCE: |
| case GL_LUMINANCE_ALPHA: |
| case GL_RGB: |
| case GL_BGR: |
| case GL_RGBA: |
| case GL_BGRA: |
| case GL_ABGR_EXT: |
| draw_rgba_pixels(ctx, x, y, width, height, colorFormat, colorType, |
| unpack, colors); |
| break; |
| default: |
| _mesa_problem(ctx, "unexpected format in glDrawDepthPixelsMESA"); |
| } |
| |
| RENDER_FINISH(swrast,ctx); |
| } |
| #endif |
