| /* |
| * 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. |
| */ |
| |
| |
| /** |
| * \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| /* This assertion is no longer valid with non-power-of-2 textures |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); |
| } |
| } |
| |
| |
| static void |
| make_2d_mipmap(const struct gl_texture_format *format, GLint border, |
| GLint srcWidth, GLint srcHeight, |
| const GLubyte *srcPtr, GLint srcRowStride, |
| GLint dstWidth, GLint dstHeight, |
| GLubyte *dstPtr, GLint dstRowStride) |
| { |
| 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 srcRowBytes = bpt * srcRowStride; |
| const GLint dstRowBytes = bpt * dstRowStride; |
| 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 + srcRowBytes; |
| 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 * srcRowBytes; |
| srcB += 2 * srcRowBytes; |
| dst += dstRowBytes; |
| } |
| |
| /* 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 srcRowStride, |
| GLint dstWidth, GLint dstHeight, GLint dstDepth, |
| GLubyte *dstPtr, GLint dstRowStride) |
| { |
| 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, srcRowStride, |
| dstWidth, dstHeight, dstPtr, dstRowStride); |
| /* do back border image */ |
| make_2d_mipmap(format, 1, srcWidth, srcHeight, |
| srcPtr + bytesPerSrcImage * (srcDepth - 1), srcRowStride, |
| dstWidth, dstHeight, |
| dstPtr + bytesPerDstImage * (dstDepth - 1), dstRowStride); |
| /* 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); |
| } |
| } |
| } |
| } |
| |
| |
| static void |
| make_1d_stack_mipmap(const struct gl_texture_format *format, GLint border, |
| GLint srcWidth, const GLubyte *srcPtr, GLuint srcRowStride, |
| GLint dstWidth, GLint dstHeight, |
| GLubyte *dstPtr, GLuint dstRowStride ) |
| { |
| 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 srcRowBytes = bpt * srcRowStride; |
| const GLint dstRowBytes = bpt * dstRowStride; |
| const GLubyte *src; |
| GLubyte *dst; |
| GLint row; |
| |
| /* Compute src and dst pointers, skipping any border */ |
| src = srcPtr + border * ((srcWidth + 1) * bpt); |
| dst = dstPtr + border * ((dstWidth + 1) * bpt); |
| |
| for (row = 0; row < dstHeightNB; row++) { |
| do_row(format, srcWidthNB, src, src, |
| dstWidthNB, dst); |
| src += srcRowBytes; |
| dst += dstRowBytes; |
| } |
| |
| 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); |
| } |
| } |
| |
| |
| /** |
| * \bugs |
| * There is quite a bit of refactoring that could be done with this function |
| * and \c make_2d_mipmap. |
| */ |
| static void |
| make_2d_stack_mipmap(const struct gl_texture_format *format, GLint border, |
| GLint srcWidth, GLint srcHeight, |
| const GLubyte *srcPtr, GLint srcRowStride, |
| GLint dstWidth, GLint dstHeight, GLint dstDepth, |
| GLubyte *dstPtr, GLint dstRowStride) |
| { |
| 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 dstDepthNB = dstDepth - 2 * border; |
| const GLint srcRowBytes = bpt * srcRowStride; |
| const GLint dstRowBytes = bpt * dstRowStride; |
| const GLubyte *srcA, *srcB; |
| GLubyte *dst; |
| GLint layer; |
| GLint row; |
| |
| /* Compute src and dst pointers, skipping any border */ |
| srcA = srcPtr + border * ((srcWidth + 1) * bpt); |
| if (srcHeight > 1) |
| srcB = srcA + srcRowBytes; |
| else |
| srcB = srcA; |
| dst = dstPtr + border * ((dstWidth + 1) * bpt); |
| |
| for (layer = 0; layer < dstDepthNB; layer++) { |
| for (row = 0; row < dstHeightNB; row++) { |
| do_row(format, srcWidthNB, srcA, srcB, |
| dstWidthNB, dst); |
| srcA += 2 * srcRowBytes; |
| srcB += 2 * srcRowBytes; |
| dst += dstRowBytes; |
| } |
| |
| /* 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); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * 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, |
| 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 || |
| texObj->Target == GL_TEXTURE_CUBE_MAP_ARB); |
| |
| 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, texObj, 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) && |
| (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT)) { |
| dstHeight = (srcHeight - 2 * border) / 2 + 2 * border; |
| } |
| else { |
| dstHeight = srcHeight; /* can't go smaller */ |
| } |
| if ((srcDepth - 2 * border > 1) && |
| (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT)) { |
| 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, texObj, target, level + 1); |
| if (!dstImage) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); |
| return; |
| } |
| |
| if (dstImage->ImageOffsets) |
| _mesa_free(dstImage->ImageOffsets); |
| |
| /* 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, srcImage->RowStride, |
| dstWidth, dstHeight, dstData, dstImage->RowStride); |
| break; |
| case GL_TEXTURE_3D: |
| make_3d_mipmap(convertFormat, border, |
| srcWidth, srcHeight, srcDepth, |
| srcData, srcImage->RowStride, |
| dstWidth, dstHeight, dstDepth, |
| dstData, dstImage->RowStride); |
| break; |
| case GL_TEXTURE_1D_ARRAY_EXT: |
| make_1d_stack_mipmap(convertFormat, border, |
| srcWidth, srcData, srcImage->RowStride, |
| dstWidth, dstHeight, |
| dstData, dstImage->RowStride); |
| break; |
| case GL_TEXTURE_2D_ARRAY_EXT: |
| make_2d_stack_mipmap(convertFormat, border, |
| srcWidth, srcHeight, |
| srcData, srcImage->RowStride, |
| dstWidth, dstHeight, |
| dstDepth, dstData, dstImage->RowStride); |
| 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]; |
| } |
| } |
| } |
| } |
| |
