diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_imaging.c')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_imaging.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/mesalib/src/mesa/swrast/s_imaging.c b/mesalib/src/mesa/swrast/s_imaging.c new file mode 100644 index 000000000..3578b713f --- /dev/null +++ b/mesalib/src/mesa/swrast/s_imaging.c @@ -0,0 +1,196 @@ +/* + * 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 "main/glheader.h" +#include "main/colortab.h" +#include "main/convolve.h" +#include "s_context.h" +#include "s_span.h" + + +void +_swrast_CopyColorTable( GLcontext *ctx, + GLenum target, GLenum internalformat, + GLint x, GLint y, GLsizei width) +{ + 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; + + swrast_render_start(ctx); + + /* read the data from framebuffer */ + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, CHAN_TYPE, data ); + + swrast_render_finish(ctx); + + /* save PBO binding */ + bufferSave = ctx->Unpack.BufferObj; + ctx->Unpack.BufferObj = ctx->Shared->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) +{ + 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; + + swrast_render_start(ctx); + + /* read the data from framebuffer */ + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, CHAN_TYPE, data ); + + swrast_render_finish(ctx); + + /* save PBO binding */ + bufferSave = ctx->Unpack.BufferObj; + ctx->Unpack.BufferObj = ctx->Shared->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) +{ + GLchan rgba[MAX_CONVOLUTION_WIDTH][4]; + struct gl_buffer_object *bufferSave; + + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* no readbuffer - OK */ + return; + } + + swrast_render_start(ctx); + + /* read the data from framebuffer */ + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, CHAN_TYPE, rgba ); + + swrast_render_finish(ctx); + + /* save PBO binding */ + bufferSave = ctx->Unpack.BufferObj; + ctx->Unpack.BufferObj = ctx->Shared->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) +{ + 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; + } + + swrast_render_start(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] ); + } + + swrast_render_finish(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->Shared->NullBufferObj; + ctx->NewState |= _NEW_PACKUNPACK; + + /* save PBO binding */ + bufferSave = ctx->Unpack.BufferObj; + ctx->Unpack.BufferObj = ctx->Shared->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; +} |