| /* |
| * Mesa 3-D graphics library |
| * Version: 6.5 |
| * |
| * 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. |
| */ |
| |
| /* KW: Moved these here to remove knowledge of swrast from core mesa. |
| * Should probably pull the entire software implementation of these |
| * extensions into either swrast or a sister module. |
| */ |
| |
| #include "s_context.h" |
| #include "s_span.h" |
| #include "colortab.h" |
| #include "convolve.h" |
| |
| |
| void |
| _swrast_CopyColorTable( GLcontext *ctx, |
| GLenum target, GLenum internalformat, |
| GLint x, GLint y, GLsizei width) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| GLchan data[MAX_WIDTH][4]; |
| struct gl_buffer_object *bufferSave; |
| |
| if (!ctx->ReadBuffer->_ColorReadBuffer) { |
| /* no readbuffer - OK */ |
| return; |
| } |
| |
| if (width > MAX_WIDTH) |
| width = MAX_WIDTH; |
| |
| RENDER_START( swrast, ctx ); |
| |
| /* read the data from framebuffer */ |
| _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, |
| width, x, y, CHAN_TYPE, data ); |
| |
| RENDER_FINISH(swrast,ctx); |
| |
| /* save PBO binding */ |
| bufferSave = ctx->Unpack.BufferObj; |
| ctx->Unpack.BufferObj = ctx->Array.NullBufferObj; |
| |
| _mesa_ColorTable(target, internalformat, width, GL_RGBA, CHAN_TYPE, data); |
| |
| /* restore PBO binding */ |
| ctx->Unpack.BufferObj = bufferSave; |
| } |
| |
| |
| void |
| _swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start, |
| GLint x, GLint y, GLsizei width) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| GLchan data[MAX_WIDTH][4]; |
| struct gl_buffer_object *bufferSave; |
| |
| if (!ctx->ReadBuffer->_ColorReadBuffer) { |
| /* no readbuffer - OK */ |
| return; |
| } |
| |
| if (width > MAX_WIDTH) |
| width = MAX_WIDTH; |
| |
| RENDER_START( swrast, ctx ); |
| |
| /* read the data from framebuffer */ |
| _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, |
| width, x, y, CHAN_TYPE, data ); |
| |
| RENDER_FINISH(swrast,ctx); |
| |
| /* save PBO binding */ |
| bufferSave = ctx->Unpack.BufferObj; |
| ctx->Unpack.BufferObj = ctx->Array.NullBufferObj; |
| |
| _mesa_ColorSubTable(target, start, width, GL_RGBA, CHAN_TYPE, data); |
| |
| /* restore PBO binding */ |
| ctx->Unpack.BufferObj = bufferSave; |
| } |
| |
| |
| void |
| _swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target, |
| GLenum internalFormat, |
| GLint x, GLint y, GLsizei width) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| GLchan rgba[MAX_CONVOLUTION_WIDTH][4]; |
| struct gl_buffer_object *bufferSave; |
| |
| if (!ctx->ReadBuffer->_ColorReadBuffer) { |
| /* no readbuffer - OK */ |
| return; |
| } |
| |
| RENDER_START( swrast, ctx ); |
| |
| /* read the data from framebuffer */ |
| _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, |
| width, x, y, CHAN_TYPE, rgba ); |
| |
| RENDER_FINISH( swrast, ctx ); |
| |
| /* save PBO binding */ |
| bufferSave = ctx->Unpack.BufferObj; |
| ctx->Unpack.BufferObj = ctx->Array.NullBufferObj; |
| |
| /* store as convolution filter */ |
| _mesa_ConvolutionFilter1D(target, internalFormat, width, |
| GL_RGBA, CHAN_TYPE, rgba); |
| |
| /* restore PBO binding */ |
| ctx->Unpack.BufferObj = bufferSave; |
| } |
| |
| |
| void |
| _swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target, |
| GLenum internalFormat, |
| GLint x, GLint y, GLsizei width, GLsizei height) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| struct gl_pixelstore_attrib packSave; |
| GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4]; |
| GLint i; |
| struct gl_buffer_object *bufferSave; |
| |
| if (!ctx->ReadBuffer->_ColorReadBuffer) { |
| /* no readbuffer - OK */ |
| return; |
| } |
| |
| RENDER_START(swrast,ctx); |
| |
| /* read pixels from framebuffer */ |
| for (i = 0; i < height; i++) { |
| _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, |
| width, x, y + i, CHAN_TYPE, rgba[i] ); |
| } |
| |
| RENDER_FINISH(swrast,ctx); |
| |
| /* |
| * HACK: save & restore context state so we can store this as a |
| * convolution filter via the GL api. Doesn't call any callbacks |
| * hanging off ctx->Unpack statechanges. |
| */ |
| |
| packSave = ctx->Unpack; /* save pixel packing params */ |
| |
| ctx->Unpack.Alignment = 1; |
| ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH; |
| ctx->Unpack.SkipPixels = 0; |
| ctx->Unpack.SkipRows = 0; |
| ctx->Unpack.ImageHeight = 0; |
| ctx->Unpack.SkipImages = 0; |
| ctx->Unpack.SwapBytes = GL_FALSE; |
| ctx->Unpack.LsbFirst = GL_FALSE; |
| ctx->Unpack.BufferObj = ctx->Array.NullBufferObj; |
| ctx->NewState |= _NEW_PACKUNPACK; |
| |
| /* save PBO binding */ |
| bufferSave = ctx->Unpack.BufferObj; |
| ctx->Unpack.BufferObj = ctx->Array.NullBufferObj; |
| |
| _mesa_ConvolutionFilter2D(target, internalFormat, width, height, |
| GL_RGBA, CHAN_TYPE, rgba); |
| |
| /* restore PBO binding */ |
| ctx->Unpack.BufferObj = bufferSave; |
| |
| ctx->Unpack = packSave; /* restore pixel packing params */ |
| ctx->NewState |= _NEW_PACKUNPACK; |
| } |