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Diffstat (limited to 'src/mesa/main/mipmap.c')
| -rw-r--r-- | src/mesa/main/mipmap.c | 1147 |
1 files changed, 1147 insertions, 0 deletions
diff --git a/src/mesa/main/mipmap.c b/src/mesa/main/mipmap.c new file mode 100644 index 00000000000..604dea34e0a --- /dev/null +++ b/src/mesa/main/mipmap.c @@ -0,0 +1,1147 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5.2 + * + * Copyright (C) 1999-2006 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. + */ + + +/** + * \file mipmap.c mipmap generation and teximage resizing functions. + */ + +#include "imports.h" +#include "mipmap.h" +#include "texcompress.h" +#include "texformat.h" +#include "teximage.h" +#include "image.h" + + + +/** + * Average together two rows of a source image to produce a single new + * row in the dest image. It's legal for the two source rows to point + * to the same data. The source width must be equal to either the + * dest width or two times the dest width. + */ +static void +do_row(const struct gl_texture_format *format, GLint srcWidth, + const GLvoid *srcRowA, const GLvoid *srcRowB, + GLint dstWidth, GLvoid *dstRow) +{ + const GLuint k0 = (srcWidth == dstWidth) ? 0 : 1; + const GLuint colStride = (srcWidth == dstWidth) ? 1 : 2; + + /* This assertion is no longer valid with non-power-of-2 textures + assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth); + */ + + switch (format->MesaFormat) { + case MESA_FORMAT_RGBA: + { + GLuint i, j, k; + const GLchan (*rowA)[4] = (const GLchan (*)[4]) srcRowA; + const GLchan (*rowB)[4] = (const GLchan (*)[4]) srcRowB; + GLchan (*dst)[4] = (GLchan (*)[4]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) / 4; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) / 4; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) / 4; + dst[i][3] = (rowA[j][3] + rowA[k][3] + + rowB[j][3] + rowB[k][3]) / 4; + } + } + return; + case MESA_FORMAT_RGB: + { + GLuint i, j, k; + const GLchan (*rowA)[3] = (const GLchan (*)[3]) srcRowA; + const GLchan (*rowB)[3] = (const GLchan (*)[3]) srcRowB; + GLchan (*dst)[3] = (GLchan (*)[3]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) / 4; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) / 4; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) / 4; + } + } + return; + case MESA_FORMAT_ALPHA: + case MESA_FORMAT_LUMINANCE: + case MESA_FORMAT_INTENSITY: + { + GLuint i, j, k; + const GLchan *rowA = (const GLchan *) srcRowA; + const GLchan *rowB = (const GLchan *) srcRowB; + GLchan *dst = (GLchan *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) / 4; + } + } + return; + case MESA_FORMAT_LUMINANCE_ALPHA: + { + GLuint i, j, k; + const GLchan (*rowA)[2] = (const GLchan (*)[2]) srcRowA; + const GLchan (*rowB)[2] = (const GLchan (*)[2]) srcRowB; + GLchan (*dst)[2] = (GLchan (*)[2]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) / 4; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) / 4; + } + } + return; + case MESA_FORMAT_Z32: + { + GLuint i, j, k; + const GLuint *rowA = (const GLuint *) srcRowA; + const GLuint *rowB = (const GLuint *) srcRowB; + GLfloat *dst = (GLfloat *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i] = rowA[j] / 4 + rowA[k] / 4 + rowB[j] / 4 + rowB[k] / 4; + } + } + return; + case MESA_FORMAT_Z16: + { + GLuint i, j, k; + const GLushort *rowA = (const GLushort *) srcRowA; + const GLushort *rowB = (const GLushort *) srcRowB; + GLushort *dst = (GLushort *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) / 4; + } + } + return; + /* Begin hardware formats */ + case MESA_FORMAT_RGBA8888: + case MESA_FORMAT_RGBA8888_REV: + case MESA_FORMAT_ARGB8888: + case MESA_FORMAT_ARGB8888_REV: +#if FEATURE_EXT_texture_sRGB + case MESA_FORMAT_SRGBA8: +#endif + { + GLuint i, j, k; + const GLubyte (*rowA)[4] = (const GLubyte (*)[4]) srcRowA; + const GLubyte (*rowB)[4] = (const GLubyte (*)[4]) srcRowB; + GLubyte (*dst)[4] = (GLubyte (*)[4]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) / 4; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) / 4; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) / 4; + dst[i][3] = (rowA[j][3] + rowA[k][3] + + rowB[j][3] + rowB[k][3]) / 4; + } + } + return; + case MESA_FORMAT_RGB888: + case MESA_FORMAT_BGR888: +#if FEATURE_EXT_texture_sRGB + case MESA_FORMAT_SRGB8: +#endif + { + GLuint i, j, k; + const GLubyte (*rowA)[3] = (const GLubyte (*)[3]) srcRowA; + const GLubyte (*rowB)[3] = (const GLubyte (*)[3]) srcRowB; + GLubyte (*dst)[3] = (GLubyte (*)[3]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) / 4; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) / 4; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) / 4; + } + } + return; + case MESA_FORMAT_RGB565: + case MESA_FORMAT_RGB565_REV: + { + GLuint i, j, k; + const GLushort *rowA = (const GLushort *) srcRowA; + const GLushort *rowB = (const GLushort *) srcRowB; + GLushort *dst = (GLushort *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + const GLint rowAr0 = rowA[j] & 0x1f; + const GLint rowAr1 = rowA[k] & 0x1f; + const GLint rowBr0 = rowB[j] & 0x1f; + const GLint rowBr1 = rowB[k] & 0x1f; + const GLint rowAg0 = (rowA[j] >> 5) & 0x3f; + const GLint rowAg1 = (rowA[k] >> 5) & 0x3f; + const GLint rowBg0 = (rowB[j] >> 5) & 0x3f; + const GLint rowBg1 = (rowB[k] >> 5) & 0x3f; + const GLint rowAb0 = (rowA[j] >> 11) & 0x1f; + const GLint rowAb1 = (rowA[k] >> 11) & 0x1f; + const GLint rowBb0 = (rowB[j] >> 11) & 0x1f; + const GLint rowBb1 = (rowB[k] >> 11) & 0x1f; + const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 2; + const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2; + const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2; + dst[i] = (blue << 11) | (green << 5) | red; + } + } + return; + case MESA_FORMAT_ARGB4444: + case MESA_FORMAT_ARGB4444_REV: + { + GLuint i, j, k; + const GLushort *rowA = (const GLushort *) srcRowA; + const GLushort *rowB = (const GLushort *) srcRowB; + GLushort *dst = (GLushort *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + const GLint rowAr0 = rowA[j] & 0xf; + const GLint rowAr1 = rowA[k] & 0xf; + const GLint rowBr0 = rowB[j] & 0xf; + const GLint rowBr1 = rowB[k] & 0xf; + const GLint rowAg0 = (rowA[j] >> 4) & 0xf; + const GLint rowAg1 = (rowA[k] >> 4) & 0xf; + const GLint rowBg0 = (rowB[j] >> 4) & 0xf; + const GLint rowBg1 = (rowB[k] >> 4) & 0xf; + const GLint rowAb0 = (rowA[j] >> 8) & 0xf; + const GLint rowAb1 = (rowA[k] >> 8) & 0xf; + const GLint rowBb0 = (rowB[j] >> 8) & 0xf; + const GLint rowBb1 = (rowB[k] >> 8) & 0xf; + const GLint rowAa0 = (rowA[j] >> 12) & 0xf; + const GLint rowAa1 = (rowA[k] >> 12) & 0xf; + const GLint rowBa0 = (rowB[j] >> 12) & 0xf; + const GLint rowBa1 = (rowB[k] >> 12) & 0xf; + const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 2; + const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2; + const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2; + const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 2; + dst[i] = (alpha << 12) | (blue << 8) | (green << 4) | red; + } + } + return; + case MESA_FORMAT_ARGB1555: + case MESA_FORMAT_ARGB1555_REV: /* XXX broken? */ + { + GLuint i, j, k; + const GLushort *rowA = (const GLushort *) srcRowA; + const GLushort *rowB = (const GLushort *) srcRowB; + GLushort *dst = (GLushort *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + const GLint rowAr0 = rowA[j] & 0x1f; + const GLint rowAr1 = rowA[k] & 0x1f; + const GLint rowBr0 = rowB[j] & 0x1f; + const GLint rowBr1 = rowB[k] & 0xf; + const GLint rowAg0 = (rowA[j] >> 5) & 0x1f; + const GLint rowAg1 = (rowA[k] >> 5) & 0x1f; + const GLint rowBg0 = (rowB[j] >> 5) & 0x1f; + const GLint rowBg1 = (rowB[k] >> 5) & 0x1f; + const GLint rowAb0 = (rowA[j] >> 10) & 0x1f; + const GLint rowAb1 = (rowA[k] >> 10) & 0x1f; + const GLint rowBb0 = (rowB[j] >> 10) & 0x1f; + const GLint rowBb1 = (rowB[k] >> 10) & 0x1f; + const GLint rowAa0 = (rowA[j] >> 15) & 0x1; + const GLint rowAa1 = (rowA[k] >> 15) & 0x1; + const GLint rowBa0 = (rowB[j] >> 15) & 0x1; + const GLint rowBa1 = (rowB[k] >> 15) & 0x1; + const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 2; + const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2; + const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2; + const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 2; + dst[i] = (alpha << 15) | (blue << 10) | (green << 5) | red; + } + } + return; + case MESA_FORMAT_AL88: + case MESA_FORMAT_AL88_REV: +#if FEATURE_EXT_texture_sRGB + case MESA_FORMAT_SLA8: +#endif + { + GLuint i, j, k; + const GLubyte (*rowA)[2] = (const GLubyte (*)[2]) srcRowA; + const GLubyte (*rowB)[2] = (const GLubyte (*)[2]) srcRowB; + GLubyte (*dst)[2] = (GLubyte (*)[2]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) >> 2; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) >> 2; + } + } + return; + case MESA_FORMAT_RGB332: + { + GLuint i, j, k; + const GLubyte *rowA = (const GLubyte *) srcRowA; + const GLubyte *rowB = (const GLubyte *) srcRowB; + GLubyte *dst = (GLubyte *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + const GLint rowAr0 = rowA[j] & 0x3; + const GLint rowAr1 = rowA[k] & 0x3; + const GLint rowBr0 = rowB[j] & 0x3; + const GLint rowBr1 = rowB[k] & 0x3; + const GLint rowAg0 = (rowA[j] >> 2) & 0x7; + const GLint rowAg1 = (rowA[k] >> 2) & 0x7; + const GLint rowBg0 = (rowB[j] >> 2) & 0x7; + const GLint rowBg1 = (rowB[k] >> 2) & 0x7; + const GLint rowAb0 = (rowA[j] >> 5) & 0x7; + const GLint rowAb1 = (rowA[k] >> 5) & 0x7; + const GLint rowBb0 = (rowB[j] >> 5) & 0x7; + const GLint rowBb1 = (rowB[k] >> 5) & 0x7; + const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 2; + const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2; + const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2; + dst[i] = (blue << 5) | (green << 2) | red; + } + } + return; + case MESA_FORMAT_A8: + case MESA_FORMAT_L8: + case MESA_FORMAT_I8: + case MESA_FORMAT_CI8: +#if FEATURE_EXT_texture_sRGB + case MESA_FORMAT_SL8: +#endif + { + GLuint i, j, k; + const GLubyte *rowA = (const GLubyte *) srcRowA; + const GLubyte *rowB = (const GLubyte *) srcRowB; + GLubyte *dst = (GLubyte *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) >> 2; + } + } + return; + case MESA_FORMAT_RGBA_FLOAT32: + { + GLuint i, j, k; + const GLfloat (*rowA)[4] = (const GLfloat (*)[4]) srcRowA; + const GLfloat (*rowB)[4] = (const GLfloat (*)[4]) srcRowB; + GLfloat (*dst)[4] = (GLfloat (*)[4]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) * 0.25F; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) * 0.25F; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) * 0.25F; + dst[i][3] = (rowA[j][3] + rowA[k][3] + + rowB[j][3] + rowB[k][3]) * 0.25F; + } + } + return; + case MESA_FORMAT_RGBA_FLOAT16: + { + GLuint i, j, k, comp; + const GLhalfARB (*rowA)[4] = (const GLhalfARB (*)[4]) srcRowA; + const GLhalfARB (*rowB)[4] = (const GLhalfARB (*)[4]) srcRowB; + GLhalfARB (*dst)[4] = (GLhalfARB (*)[4]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + for (comp = 0; comp < 4; comp++) { + GLfloat aj, ak, bj, bk; + aj = _mesa_half_to_float(rowA[j][comp]); + ak = _mesa_half_to_float(rowA[k][comp]); + bj = _mesa_half_to_float(rowB[j][comp]); + bk = _mesa_half_to_float(rowB[k][comp]); + dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F); + } + } + } + return; + case MESA_FORMAT_RGB_FLOAT32: + { + GLuint i, j, k; + const GLfloat (*rowA)[3] = (const GLfloat (*)[3]) srcRowA; + const GLfloat (*rowB)[3] = (const GLfloat (*)[3]) srcRowB; + GLfloat (*dst)[3] = (GLfloat (*)[3]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) * 0.25F; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) * 0.25F; + dst[i][2] = (rowA[j][2] + rowA[k][2] + + rowB[j][2] + rowB[k][2]) * 0.25F; + } + } + return; + case MESA_FORMAT_RGB_FLOAT16: + { + GLuint i, j, k, comp; + const GLhalfARB (*rowA)[3] = (const GLhalfARB (*)[3]) srcRowA; + const GLhalfARB (*rowB)[3] = (const GLhalfARB (*)[3]) srcRowB; + GLhalfARB (*dst)[3] = (GLhalfARB (*)[3]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + for (comp = 0; comp < 3; comp++) { + GLfloat aj, ak, bj, bk; + aj = _mesa_half_to_float(rowA[j][comp]); + ak = _mesa_half_to_float(rowA[k][comp]); + bj = _mesa_half_to_float(rowB[j][comp]); + bk = _mesa_half_to_float(rowB[k][comp]); + dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F); + } + } + } + return; + case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32: + { + GLuint i, j, k; + const GLfloat (*rowA)[2] = (const GLfloat (*)[2]) srcRowA; + const GLfloat (*rowB)[2] = (const GLfloat (*)[2]) srcRowB; + GLfloat (*dst)[2] = (GLfloat (*)[2]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i][0] = (rowA[j][0] + rowA[k][0] + + rowB[j][0] + rowB[k][0]) * 0.25F; + dst[i][1] = (rowA[j][1] + rowA[k][1] + + rowB[j][1] + rowB[k][1]) * 0.25F; + } + } + return; + case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16: + { + GLuint i, j, k, comp; + const GLhalfARB (*rowA)[2] = (const GLhalfARB (*)[2]) srcRowA; + const GLhalfARB (*rowB)[2] = (const GLhalfARB (*)[2]) srcRowB; + GLhalfARB (*dst)[2] = (GLhalfARB (*)[2]) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + for (comp = 0; comp < 2; comp++) { + GLfloat aj, ak, bj, bk; + aj = _mesa_half_to_float(rowA[j][comp]); + ak = _mesa_half_to_float(rowA[k][comp]); + bj = _mesa_half_to_float(rowB[j][comp]); + bk = _mesa_half_to_float(rowB[k][comp]); + dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F); + } + } + } + return; + case MESA_FORMAT_ALPHA_FLOAT32: + case MESA_FORMAT_LUMINANCE_FLOAT32: + case MESA_FORMAT_INTENSITY_FLOAT32: + { + GLuint i, j, k; + const GLfloat *rowA = (const GLfloat *) srcRowA; + const GLfloat *rowB = (const GLfloat *) srcRowB; + GLfloat *dst = (GLfloat *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) * 0.25F; + } + } + return; + case MESA_FORMAT_ALPHA_FLOAT16: + case MESA_FORMAT_LUMINANCE_FLOAT16: + case MESA_FORMAT_INTENSITY_FLOAT16: + { + GLuint i, j, k; + const GLhalfARB *rowA = (const GLhalfARB *) srcRowA; + const GLhalfARB *rowB = (const GLhalfARB *) srcRowB; + GLhalfARB *dst = (GLhalfARB *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + GLfloat aj, ak, bj, bk; + aj = _mesa_half_to_float(rowA[j]); + ak = _mesa_half_to_float(rowA[k]); + bj = _mesa_half_to_float(rowB[j]); + bk = _mesa_half_to_float(rowB[k]); + dst[i] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F); + } + } + return; + + default: + _mesa_problem(NULL, "bad format in do_row()"); + } +} + + +/* + * These functions generate a 1/2-size mipmap image from a source image. + * Texture borders are handled by copying or averaging the source image's + * border texels, depending on the scale-down factor. + */ + +static void +make_1d_mipmap(const struct gl_texture_format *format, GLint border, + GLint srcWidth, const GLubyte *srcPtr, + GLint dstWidth, GLubyte *dstPtr) +{ + const GLint bpt = format->TexelBytes; + const GLubyte *src; + GLubyte *dst; + + /* skip the border pixel, if any */ + src = srcPtr + border * bpt; + dst = dstPtr + border * bpt; + + /* we just duplicate the input row, kind of hack, saves code */ + do_row(format, srcWidth - 2 * border, src, src, + dstWidth - 2 * border, dst); + + if (border) { + /* copy left-most pixel from source */ + MEMCPY(dstPtr, srcPtr, bpt); + /* copy right-most pixel from source */ + MEMCPY(dstPtr + (dstWidth - 1) * bpt, + srcPtr + (srcWidth - 1) * bpt, + bpt); + } +} + + +/** + * XXX need to use the tex image's row stride! + */ +static void +make_2d_mipmap(const struct gl_texture_format *format, GLint border, + GLint srcWidth, GLint srcHeight, const GLubyte *srcPtr, + GLint dstWidth, GLint dstHeight, GLubyte *dstPtr) +{ + const GLint bpt = format->TexelBytes; + const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */ + const GLint dstWidthNB = dstWidth - 2 * border; + const GLint dstHeightNB = dstHeight - 2 * border; + const GLint srcRowStride = bpt * srcWidth; + const GLint dstRowStride = bpt * dstWidth; + const GLubyte *srcA, *srcB; + GLubyte *dst; + GLint row; + + /* Compute src and dst pointers, skipping any border */ + srcA = srcPtr + border * ((srcWidth + 1) * bpt); + if (srcHeight > 1) + srcB = srcA + srcRowStride; + else + srcB = srcA; + dst = dstPtr + border * ((dstWidth + 1) * bpt); + + for (row = 0; row < dstHeightNB; row++) { + do_row(format, srcWidthNB, srcA, srcB, + dstWidthNB, dst); + srcA += 2 * srcRowStride; + srcB += 2 * srcRowStride; + dst += dstRowStride; + } + + /* This is ugly but probably won't be used much */ + if (border > 0) { + /* fill in dest border */ + /* lower-left border pixel */ + MEMCPY(dstPtr, srcPtr, bpt); + /* lower-right border pixel */ + MEMCPY(dstPtr + (dstWidth - 1) * bpt, + srcPtr + (srcWidth - 1) * bpt, bpt); + /* upper-left border pixel */ + MEMCPY(dstPtr + dstWidth * (dstHeight - 1) * bpt, + srcPtr + srcWidth * (srcHeight - 1) * bpt, bpt); + /* upper-right border pixel */ + MEMCPY(dstPtr + (dstWidth * dstHeight - 1) * bpt, + srcPtr + (srcWidth * srcHeight - 1) * bpt, bpt); + /* lower border */ + do_row(format, srcWidthNB, + srcPtr + bpt, + srcPtr + bpt, + dstWidthNB, dstPtr + bpt); + /* upper border */ + do_row(format, srcWidthNB, + srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt, + srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt, + dstWidthNB, + dstPtr + (dstWidth * (dstHeight - 1) + 1) * bpt); + /* left and right borders */ + if (srcHeight == dstHeight) { + /* copy border pixel from src to dst */ + for (row = 1; row < srcHeight; row++) { + MEMCPY(dstPtr + dstWidth * row * bpt, + srcPtr + srcWidth * row * bpt, bpt); + MEMCPY(dstPtr + (dstWidth * row + dstWidth - 1) * bpt, + srcPtr + (srcWidth * row + srcWidth - 1) * bpt, bpt); + } + } + else { + /* average two src pixels each dest pixel */ + for (row = 0; row < dstHeightNB; row += 2) { + do_row(format, 1, + srcPtr + (srcWidth * (row * 2 + 1)) * bpt, + srcPtr + (srcWidth * (row * 2 + 2)) * bpt, + 1, dstPtr + (dstWidth * row + 1) * bpt); + do_row(format, 1, + srcPtr + (srcWidth * (row * 2 + 1) + srcWidth - 1) * bpt, + srcPtr + (srcWidth * (row * 2 + 2) + srcWidth - 1) * bpt, + 1, dstPtr + (dstWidth * row + 1 + dstWidth - 1) * bpt); + } + } + } +} + + +static void +make_3d_mipmap(const struct gl_texture_format *format, GLint border, + GLint srcWidth, GLint srcHeight, GLint srcDepth, + const GLubyte *srcPtr, + GLint dstWidth, GLint dstHeight, GLint dstDepth, + GLubyte *dstPtr) +{ + const GLint bpt = format->TexelBytes; + const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */ + const GLint srcDepthNB = srcDepth - 2 * border; + const GLint dstWidthNB = dstWidth - 2 * border; + const GLint dstHeightNB = dstHeight - 2 * border; + const GLint dstDepthNB = dstDepth - 2 * border; + GLvoid *tmpRowA, *tmpRowB; + GLint img, row; + GLint bytesPerSrcImage, bytesPerDstImage; + GLint bytesPerSrcRow, bytesPerDstRow; + GLint srcImageOffset, srcRowOffset; + + (void) srcDepthNB; /* silence warnings */ + + /* Need two temporary row buffers */ + tmpRowA = _mesa_malloc(srcWidth * bpt); + if (!tmpRowA) + return; + tmpRowB = _mesa_malloc(srcWidth * bpt); + if (!tmpRowB) { + _mesa_free(tmpRowA); + return; + } + + bytesPerSrcImage = srcWidth * srcHeight * bpt; + bytesPerDstImage = dstWidth * dstHeight * bpt; + + bytesPerSrcRow = srcWidth * bpt; + bytesPerDstRow = dstWidth * bpt; + + /* Offset between adjacent src images to be averaged together */ + srcImageOffset = (srcDepth == dstDepth) ? 0 : bytesPerSrcImage; + + /* Offset between adjacent src rows to be averaged together */ + srcRowOffset = (srcHeight == dstHeight) ? 0 : srcWidth * bpt; + + /* + * Need to average together up to 8 src pixels for each dest pixel. + * Break that down into 3 operations: + * 1. take two rows from source image and average them together. + * 2. take two rows from next source image and average them together. + * 3. take the two averaged rows and average them for the final dst row. + */ + + /* + _mesa_printf("mip3d %d x %d x %d -> %d x %d x %d\n", + srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth); + */ + + for (img = 0; img < dstDepthNB; img++) { + /* first source image pointer, skipping border */ + const GLubyte *imgSrcA = srcPtr + + (bytesPerSrcImage + bytesPerSrcRow + border) * bpt * border + + img * (bytesPerSrcImage + srcImageOffset); + /* second source image pointer, skipping border */ + const GLubyte *imgSrcB = imgSrcA + srcImageOffset; + /* address of the dest image, skipping border */ + GLubyte *imgDst = dstPtr + + (bytesPerDstImage + bytesPerDstRow + border) * bpt * border + + img * bytesPerDstImage; + + /* setup the four source row pointers and the dest row pointer */ + const GLubyte *srcImgARowA = imgSrcA; + const GLubyte *srcImgARowB = imgSrcA + srcRowOffset; + const GLubyte *srcImgBRowA = imgSrcB; + const GLubyte *srcImgBRowB = imgSrcB + srcRowOffset; + GLubyte *dstImgRow = imgDst; + + for (row = 0; row < dstHeightNB; row++) { + /* Average together two rows from first src image */ + do_row(format, srcWidthNB, srcImgARowA, srcImgARowB, + srcWidthNB, tmpRowA); + /* Average together two rows from second src image */ + do_row(format, srcWidthNB, srcImgBRowA, srcImgBRowB, + srcWidthNB, tmpRowB); + /* Average together the temp rows to make the final row */ + do_row(format, srcWidthNB, tmpRowA, tmpRowB, + dstWidthNB, dstImgRow); + /* advance to next rows */ + srcImgARowA += bytesPerSrcRow + srcRowOffset; + srcImgARowB += bytesPerSrcRow + srcRowOffset; + srcImgBRowA += bytesPerSrcRow + srcRowOffset; + srcImgBRowB += bytesPerSrcRow + srcRowOffset; + dstImgRow += bytesPerDstRow; + } + } + + _mesa_free(tmpRowA); + _mesa_free(tmpRowB); + + /* Luckily we can leverage the make_2d_mipmap() function here! */ + if (border > 0) { + /* do front border image */ + make_2d_mipmap(format, 1, srcWidth, srcHeight, srcPtr, + dstWidth, dstHeight, dstPtr); + /* do back border image */ + make_2d_mipmap(format, 1, srcWidth, srcHeight, + srcPtr + bytesPerSrcImage * (srcDepth - 1), + dstWidth, dstHeight, + dstPtr + bytesPerDstImage * (dstDepth - 1)); + /* do four remaining border edges that span the image slices */ + if (srcDepth == dstDepth) { + /* just copy border pixels from src to dst */ + for (img = 0; img < dstDepthNB; img++) { + const GLubyte *src; + GLubyte *dst; + + /* do border along [img][row=0][col=0] */ + src = srcPtr + (img + 1) * bytesPerSrcImage; + dst = dstPtr + (img + 1) * bytesPerDstImage; + MEMCPY(dst, src, bpt); + + /* do border along [img][row=dstHeight-1][col=0] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (srcHeight - 1) * bytesPerSrcRow; + dst = dstPtr + (img + 1) * bytesPerDstImage + + (dstHeight - 1) * bytesPerDstRow; + MEMCPY(dst, src, bpt); + + /* do border along [img][row=0][col=dstWidth-1] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (srcWidth - 1) * bpt; + dst = dstPtr + (img + 1) * bytesPerDstImage + + (dstWidth - 1) * bpt; + MEMCPY(dst, src, bpt); + + /* do border along [img][row=dstHeight-1][col=dstWidth-1] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (bytesPerSrcImage - bpt); + dst = dstPtr + (img + 1) * bytesPerDstImage + + (bytesPerDstImage - bpt); + MEMCPY(dst, src, bpt); + } + } + else { + /* average border pixels from adjacent src image pairs */ + ASSERT(srcDepthNB == 2 * dstDepthNB); + for (img = 0; img < dstDepthNB; img++) { + const GLubyte *src; + GLubyte *dst; + + /* do border along [img][row=0][col=0] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage; + dst = dstPtr + (img + 1) * bytesPerDstImage; + do_row(format, 1, src, src + srcImageOffset, 1, dst); + + /* do border along [img][row=dstHeight-1][col=0] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (srcHeight - 1) * bytesPerSrcRow; + dst = dstPtr + (img + 1) * bytesPerDstImage + + (dstHeight - 1) * bytesPerDstRow; + do_row(format, 1, src, src + srcImageOffset, 1, dst); + + /* do border along [img][row=0][col=dstWidth-1] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (srcWidth - 1) * bpt; + dst = dstPtr + (img + 1) * bytesPerDstImage + + (dstWidth - 1) * bpt; + do_row(format, 1, src, src + srcImageOffset, 1, dst); + + /* do border along [img][row=dstHeight-1][col=dstWidth-1] */ + src = srcPtr + (img * 2 + 1) * bytesPerSrcImage + + (bytesPerSrcImage - bpt); + dst = dstPtr + (img + 1) * bytesPerDstImage + + (bytesPerDstImage - bpt); + do_row(format, 1, src, src + srcImageOffset, 1, dst); + } + } + } +} + + +/** + * For GL_SGIX_generate_mipmap: + * Generate a complete set of mipmaps from texObj's base-level image. + * Stop at texObj's MaxLevel or when we get to the 1x1 texture. + */ +void +_mesa_generate_mipmap(GLcontext *ctx, GLenum target, + const struct gl_texture_unit *texUnit, + struct gl_texture_object *texObj) +{ + const struct gl_texture_image *srcImage; + const struct gl_texture_format *convertFormat; + const GLubyte *srcData = NULL; + GLubyte *dstData = NULL; + GLint level, maxLevels; + + ASSERT(texObj); + /* XXX choose cube map face here??? */ + srcImage = texObj->Image[0][texObj->BaseLevel]; + ASSERT(srcImage); + + maxLevels = _mesa_max_texture_levels(ctx, texObj->Target); + ASSERT(maxLevels > 0); /* bad target */ + + /* Find convertFormat - the format that do_row() will process */ + if (srcImage->IsCompressed) { + /* setup for compressed textures */ + GLuint row; + GLint components, size; + GLchan *dst; + + assert(texObj->Target == GL_TEXTURE_2D); + + if (srcImage->_BaseFormat == GL_RGB) { + convertFormat = &_mesa_texformat_rgb; + components = 3; + } + else if (srcImage->_BaseFormat == GL_RGBA) { + convertFormat = &_mesa_texformat_rgba; + components = 4; + } + else { + _mesa_problem(ctx, "bad srcImage->_BaseFormat in _mesa_generate_mipmaps"); + return; + } + + /* allocate storage for uncompressed GL_RGB or GL_RGBA images */ + size = _mesa_bytes_per_pixel(srcImage->_BaseFormat, CHAN_TYPE) + * srcImage->Width * srcImage->Height * srcImage->Depth + 20; + /* 20 extra bytes, just be safe when calling last FetchTexel */ + srcData = (GLubyte *) _mesa_malloc(size); + if (!srcData) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps"); + return; + } + dstData = (GLubyte *) _mesa_malloc(size / 2); /* 1/4 would probably be OK */ + if (!dstData) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps"); + _mesa_free((void *) srcData); + return; + } + + /* decompress base image here */ + dst = (GLchan *) srcData; + for (row = 0; row < srcImage->Height; row++) { + GLuint col; + for (col = 0; col < srcImage->Width; col++) { + srcImage->FetchTexelc(srcImage, col, row, 0, dst); + dst += components; + } + } + } + else { + /* uncompressed */ + convertFormat = srcImage->TexFormat; + } + + for (level = texObj->BaseLevel; level < texObj->MaxLevel + && level < maxLevels - 1; level++) { + /* generate image[level+1] from image[level] */ + const struct gl_texture_image *srcImage; + struct gl_texture_image *dstImage; + GLint srcWidth, srcHeight, srcDepth; + GLint dstWidth, dstHeight, dstDepth; + GLint border, bytesPerTexel; + + /* get src image parameters */ + srcImage = _mesa_select_tex_image(ctx, texUnit, target, level); + ASSERT(srcImage); + srcWidth = srcImage->Width; + srcHeight = srcImage->Height; + srcDepth = srcImage->Depth; + border = srcImage->Border; + + /* compute next (level+1) image size */ + if (srcWidth - 2 * border > 1) { + dstWidth = (srcWidth - 2 * border) / 2 + 2 * border; + } + else { + dstWidth = srcWidth; /* can't go smaller */ + } + if (srcHeight - 2 * border > 1) { + dstHeight = (srcHeight - 2 * border) / 2 + 2 * border; + } + else { + dstHeight = srcHeight; /* can't go smaller */ + } + if (srcDepth - 2 * border > 1) { + dstDepth = (srcDepth - 2 * border) / 2 + 2 * border; + } + else { + dstDepth = srcDepth; /* can't go smaller */ + } + + if (dstWidth == srcWidth && + dstHeight == srcHeight && + dstDepth == srcDepth) { + /* all done */ + if (srcImage->IsCompressed) { + _mesa_free((void *) srcData); + _mesa_free(dstData); + } + return; + } + + /* get dest gl_texture_image */ + dstImage = _mesa_get_tex_image(ctx, texUnit, target, level + 1); + if (!dstImage) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); + return; + } + + /* Free old image data */ + if (dstImage->Data) + ctx->Driver.FreeTexImageData(ctx, dstImage); + + /* initialize new image */ + _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight, + dstDepth, border, srcImage->InternalFormat); + dstImage->DriverData = NULL; + dstImage->TexFormat = srcImage->TexFormat; + dstImage->FetchTexelc = srcImage->FetchTexelc; + dstImage->FetchTexelf = srcImage->FetchTexelf; + dstImage->IsCompressed = srcImage->IsCompressed; + if (dstImage->IsCompressed) { + dstImage->CompressedSize + = ctx->Driver.CompressedTextureSize(ctx, dstImage->Width, + dstImage->Height, + dstImage->Depth, + dstImage->TexFormat->MesaFormat); + ASSERT(dstImage->CompressedSize > 0); + } + + ASSERT(dstImage->TexFormat); + ASSERT(dstImage->FetchTexelc); + ASSERT(dstImage->FetchTexelf); + + /* Alloc new teximage data buffer. + * Setup src and dest data pointers. + */ + if (dstImage->IsCompressed) { + dstImage->Data = _mesa_alloc_texmemory(dstImage->CompressedSize); + if (!dstImage->Data) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); + return; + } + /* srcData and dstData are already set */ + ASSERT(srcData); + ASSERT(dstData); + } + else { + bytesPerTexel = dstImage->TexFormat->TexelBytes; + ASSERT(dstWidth * dstHeight * dstDepth * bytesPerTexel > 0); + dstImage->Data = _mesa_alloc_texmemory(dstWidth * dstHeight + * dstDepth * bytesPerTexel); + if (!dstImage->Data) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); + return; + } + srcData = (const GLubyte *) srcImage->Data; + dstData = (GLubyte *) dstImage->Data; + } + + /* + * We use simple 2x2 averaging to compute the next mipmap level. + */ + switch (target) { + case GL_TEXTURE_1D: + make_1d_mipmap(convertFormat, border, + srcWidth, srcData, + dstWidth, dstData); + break; + case GL_TEXTURE_2D: + case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB: + case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB: + case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB: + case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB: + make_2d_mipmap(convertFormat, border, + srcWidth, srcHeight, srcData, + dstWidth, dstHeight, dstData); + break; + case GL_TEXTURE_3D: + make_3d_mipmap(convertFormat, border, + srcWidth, srcHeight, srcDepth, srcData, + dstWidth, dstHeight, dstDepth, dstData); + break; + case GL_TEXTURE_RECTANGLE_NV: + /* no mipmaps, do nothing */ + break; + default: + _mesa_problem(ctx, "bad dimensions in _mesa_generate_mipmaps"); + return; + } + + if (dstImage->IsCompressed) { + GLubyte *temp; + /* compress image from dstData into dstImage->Data */ + const GLenum srcFormat = convertFormat->BaseFormat; + GLint dstRowStride + = _mesa_compressed_row_stride(dstImage->TexFormat->MesaFormat, dstWidth); + ASSERT(srcFormat == GL_RGB || srcFormat == GL_RGBA); + dstImage->TexFormat->StoreImage(ctx, 2, dstImage->_BaseFormat, + dstImage->TexFormat, + dstImage->Data, + 0, 0, 0, /* dstX/Y/Zoffset */ + dstRowStride, 0, /* strides */ + dstWidth, dstHeight, 1, /* size */ + srcFormat, CHAN_TYPE, + dstData, /* src data, actually */ + &ctx->DefaultPacking); + /* swap src and dest pointers */ + temp = (GLubyte *) srcData; + srcData = dstData; + dstData = temp; + } + + } /* loop over mipmap levels */ +} + + +/** + * Helper function for drivers which need to rescale texture images to + * certain aspect ratios. + * Nearest filtering only (for broken hardware that can't support + * all aspect ratios). This can be made a lot faster, but I don't + * really care enough... + */ +void +_mesa_rescale_teximage2d(GLuint bytesPerPixel, + GLuint srcStrideInPixels, + GLuint dstRowStride, + GLint srcWidth, GLint srcHeight, + GLint dstWidth, GLint dstHeight, + const GLvoid *srcImage, GLvoid *dstImage) +{ + GLint row, col; + +#define INNER_LOOP( TYPE, HOP, WOP ) \ + for ( row = 0 ; row < dstHeight ; row++ ) { \ + GLint srcRow = row HOP hScale; \ + for ( col = 0 ; col < dstWidth ; col++ ) { \ + GLint srcCol = col WOP wScale; \ + dst[col] = src[srcRow * srcStrideInPixels + srcCol]; \ + } \ + dst = (TYPE *) ((GLubyte *) dst + dstRowStride); \ + } \ + +#define RESCALE_IMAGE( TYPE ) \ +do { \ + const TYPE *src = (const TYPE *)srcImage; \ + TYPE *dst = (TYPE *)dstImage; \ + \ + if ( srcHeight < dstHeight ) { \ + const GLint hScale = dstHeight / srcHeight; \ + if ( srcWidth < dstWidth ) { \ + const GLint wScale = dstWidth / srcWidth; \ + INNER_LOOP( TYPE, /, / ); \ + } \ + else { \ + const GLint wScale = srcWidth / dstWidth; \ + INNER_LOOP( TYPE, /, * ); \ + } \ + } \ + else { \ + const GLint hScale = srcHeight / dstHeight; \ + if ( srcWidth < dstWidth ) { \ + const GLint wScale = dstWidth / srcWidth; \ + INNER_LOOP( TYPE, *, / ); \ + } \ + else { \ + const GLint wScale = srcWidth / dstWidth; \ + INNER_LOOP( TYPE, *, * ); \ + } \ + } \ +} while (0) + + switch ( bytesPerPixel ) { + case 4: + RESCALE_IMAGE( GLuint ); + break; + + case 2: + RESCALE_IMAGE( GLushort ); + break; + + case 1: + RESCALE_IMAGE( GLubyte ); + break; + default: + _mesa_problem(NULL,"unexpected bytes/pixel in _mesa_rescale_teximage2d"); + } +} + + +/** + * Upscale an image by replication, not (typical) stretching. + * We use this when the image width or height is less than a + * certain size (4, 8) and we need to upscale an image. + */ +void +_mesa_upscale_teximage2d(GLsizei inWidth, GLsizei inHeight, + GLsizei outWidth, GLsizei outHeight, + GLint comps, const GLchan *src, GLint srcRowStride, + GLchan *dest ) +{ + GLint i, j, k; + + ASSERT(outWidth >= inWidth); + ASSERT(outHeight >= inHeight); +#if 0 + ASSERT(inWidth == 1 || inWidth == 2 || inHeight == 1 || inHeight == 2); + ASSERT((outWidth & 3) == 0); + ASSERT((outHeight & 3) == 0); +#endif + + for (i = 0; i < outHeight; i++) { + const GLint ii = i % inHeight; + for (j = 0; j < outWidth; j++) { + const GLint jj = j % inWidth; + for (k = 0; k < comps; k++) { + dest[(i * outWidth + j) * comps + k] + = src[ii * srcRowStride + jj * comps + k]; + } + } + } +} + |