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Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/convolve.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/src/mesa/main/convolve.c b/src/mesa/main/convolve.c new file mode 100644 index 00000000000..ee7a8134213 --- /dev/null +++ b/src/mesa/main/convolve.c @@ -0,0 +1,416 @@ +/* $Id: convolve.c,v 1.1 2000/07/12 13:00:09 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.3 + * + * Copyright (C) 1999-2000 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. + */ + + +/* + * Image convolution functions. + * + * Notes: filter kernel elements are indexed by <n> and <m> as in + * the GL spec. + */ + + +#ifdef PC_HEADER +#include "all.h" +#else +#include "glheader.h" +#include "types.h" +#endif + + +void +_mesa_convolve_1d_reduce(GLint srcWidth, const GLfloat src[][4], + GLint filterWidth, const GLfloat filter[][4], + GLfloat dest[][4]) +{ + const GLint dstWidth = srcWidth - (filterWidth - 1); + GLint i, n; + + if (dstWidth <= 0) + return; /* null result */ + + for (i = 0; i < dstWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (n = 0; n < filterWidth; n++) { + sumR += src[i + n][RCOMP] * filter[n][RCOMP]; + sumG += src[i + n][GCOMP] * filter[n][GCOMP]; + sumB += src[i + n][BCOMP] * filter[n][BCOMP]; + sumA += src[i + n][ACOMP] * filter[n][ACOMP]; + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_1d_constant(GLint srcWidth, const GLfloat src[][4], + GLint filterWidth, const GLfloat filter[][4], + const GLfloat borderColor[4], GLfloat dest[][4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth || i + n - halfFilterWidth >= srcWidth) { + sumR += borderColor[RCOMP] * filter[n][RCOMP]; + sumG += borderColor[GCOMP] * filter[n][GCOMP]; + sumB += borderColor[BCOMP] * filter[n][BCOMP]; + sumA += borderColor[ACOMP] * filter[n][ACOMP]; + } + else { + sumR += src[i + n - halfFilterWidth][RCOMP] * filter[n][RCOMP]; + sumG += src[i + n - halfFilterWidth][GCOMP] * filter[n][GCOMP]; + sumB += src[i + n - halfFilterWidth][BCOMP] * filter[n][BCOMP]; + sumA += src[i + n - halfFilterWidth][ACOMP] * filter[n][ACOMP]; + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_1d_replicate(GLint srcWidth, const GLfloat src[][4], + GLint filterWidth, const GLfloat filter[][4], + GLfloat dest[][4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth) { + sumR += src[0][RCOMP] * filter[n][RCOMP]; + sumG += src[0][GCOMP] * filter[n][GCOMP]; + sumB += src[0][BCOMP] * filter[n][BCOMP]; + sumA += src[0][ACOMP] * filter[n][ACOMP]; + } + else if (i + n - halfFilterWidth >= srcWidth) { + sumR += src[srcWidth - 1][RCOMP] * filter[n][RCOMP]; + sumG += src[srcWidth - 1][GCOMP] * filter[n][GCOMP]; + sumB += src[srcWidth - 1][BCOMP] * filter[n][BCOMP]; + sumA += src[srcWidth - 1][ACOMP] * filter[n][ACOMP]; + } + else { + sumR += src[i + n - halfFilterWidth][RCOMP] * filter[n][RCOMP]; + sumG += src[i + n - halfFilterWidth][GCOMP] * filter[n][GCOMP]; + sumB += src[i + n - halfFilterWidth][BCOMP] * filter[n][BCOMP]; + sumA += src[i + n - halfFilterWidth][ACOMP] * filter[n][ACOMP]; + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +/* + * <src> is the source image width width = srcWidth, height = filterHeight. + * <filter> has width <filterWidth> and height <filterHeight>. + * <dst> is a 1-D image span of width <srcWidth> - (<filterWidth> - 1). + */ +void +_mesa_convolve_2d_reduce(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat filter[][4], + GLfloat dest[][4]) +{ + const GLint dstWidth = srcWidth - (filterWidth - 1); + GLint i, n, m; + + if (dstWidth <= 0) + return; /* null result */ + + /* XXX todo */ + for (i = 0; i < dstWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (n = 0; n < filterHeight; n++) { + for (m = 0; m < filterWidth; m++) { + const GLint k = n * srcWidth + i + m; + sumR += src[k][RCOMP] * filter[n][RCOMP]; + sumG += src[k][GCOMP] * filter[n][GCOMP]; + sumB += src[k][BCOMP] * filter[n][BCOMP]; + sumA += src[k][ACOMP] * filter[n][ACOMP]; + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_2d_constant(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat filter[][4], + GLfloat dest[][4], + const GLfloat borderColor[4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n, m; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (m = 0; m < filterHeight; m++) { + const GLfloat (*filterRow)[4] = filter + m * filterWidth; + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth || + i + n - halfFilterWidth >= srcWidth) { + sumR += borderColor[RCOMP] * filterRow[n][RCOMP]; + sumG += borderColor[GCOMP] * filterRow[n][GCOMP]; + sumB += borderColor[BCOMP] * filterRow[n][BCOMP]; + sumA += borderColor[ACOMP] * filterRow[n][ACOMP]; + } + else { + const GLint k = m * srcWidth + i + n - halfFilterWidth; + sumR += src[k][RCOMP] * filterRow[n][RCOMP]; + sumG += src[k][GCOMP] * filterRow[n][GCOMP]; + sumB += src[k][BCOMP] * filterRow[n][BCOMP]; + sumA += src[k][ACOMP] * filterRow[n][ACOMP]; + } + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_2d_replicate(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat filter[][4], + GLfloat dest[][4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n, m; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (m = 0; m < filterHeight; m++) { + const GLfloat (*filterRow)[4] = filter + m * filterWidth; + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth) { + const GLint k = m * srcWidth + 0; + sumR += src[k][RCOMP] * filterRow[n][RCOMP]; + sumG += src[k][GCOMP] * filterRow[n][GCOMP]; + sumB += src[k][BCOMP] * filterRow[n][BCOMP]; + sumA += src[k][ACOMP] * filterRow[n][ACOMP]; + } + else if (i + n - halfFilterWidth >= srcWidth) { + const GLint k = m * srcWidth + srcWidth - 1; + sumR += src[k][RCOMP] * filterRow[n][RCOMP]; + sumG += src[k][GCOMP] * filterRow[n][GCOMP]; + sumB += src[k][BCOMP] * filterRow[n][BCOMP]; + sumA += src[k][ACOMP] * filterRow[n][ACOMP]; + } + else { + const GLint k = m * srcWidth + i + n - halfFilterWidth; + sumR += src[k][RCOMP] * filterRow[n][RCOMP]; + sumG += src[k][GCOMP] * filterRow[n][GCOMP]; + sumB += src[k][BCOMP] * filterRow[n][BCOMP]; + sumA += src[k][ACOMP] * filterRow[n][ACOMP]; + } + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_sep_constant(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat rowFilt[][4], + const GLfloat colFilt[][4], + GLfloat dest[][4], + const GLfloat borderColor[4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n, m; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (m = 0; m < filterHeight; m++) { + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth || + i + n - halfFilterWidth >= srcWidth) { + sumR += borderColor[RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += borderColor[GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += borderColor[BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += borderColor[ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + else { + const GLint k = m * srcWidth + i + n - halfFilterWidth; + sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} + + +void +_mesa_convolve_sep_reduce(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat rowFilt[][4], + const GLfloat colFilt[][4], + GLfloat dest[][4]) +{ +#if 00 + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n, m; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (m = 0; m < filterHeight; m++) { + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth || + i + n - halfFilterWidth >= srcWidth) { + sumR += borderColor[RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += borderColor[GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += borderColor[BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += borderColor[ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + else { + const GLint k = m * srcWidth + i + n - halfFilterWidth; + sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +#endif +} + + +void +_mesa_convolve_sep_replicate(GLint srcWidth, GLint srcHeight, + const GLfloat src[][4], + GLint filterWidth, GLint filterHeight, + const GLfloat rowFilt[][4], + const GLfloat colFilt[][4], + GLfloat dest[][4]) +{ + const GLint halfFilterWidth = filterWidth / 2; + GLint i, n, m; + + for (i = 0; i < srcWidth; i++) { + GLfloat sumR = 0.0; + GLfloat sumG = 0.0; + GLfloat sumB = 0.0; + GLfloat sumA = 0.0; + for (m = 0; m < filterHeight; m++) { + for (n = 0; n < filterWidth; n++) { + if (i + n < halfFilterWidth) { + const GLint k = m * srcWidth + 0; + sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + else if (i + n - halfFilterWidth >= srcWidth) { + const GLint k = m * srcWidth + srcWidth - 1; + sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + else { + const GLint k = m * srcWidth + i + n - halfFilterWidth; + sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP]; + sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP]; + sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP]; + sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP]; + } + } + } + dest[i][RCOMP] = sumR; + dest[i][GCOMP] = sumG; + dest[i][BCOMP] = sumB; + dest[i][ACOMP] = sumA; + } +} |