from mako.template import Template from sys import argv string = """/* * Mesa 3-D graphics library * * Copyright (c) 2011 VMware, Inc. * Copyright (c) 2014 Intel Corporation. * * 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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. */ /** * Color, depth, stencil packing functions. * Used to pack basic color, depth and stencil formats to specific * hardware formats. * * There are both per-pixel and per-row packing functions: * - The former will be used by swrast to write values to the color, depth, * stencil buffers when drawing points, lines and masked spans. * - The later will be used for image-oriented functions like glDrawPixels, * glAccum, and glTexImage. */ #include #include "errors.h" #include "format_unpack.h" #include "format_utils.h" #include "macros.h" #include "util/format_rgb9e5.h" #include "util/format_r11g11b10f.h" #include "util/format_srgb.h" #define UNPACK(SRC, OFFSET, BITS) (((SRC) >> (OFFSET)) & MAX_UINT(BITS)) <% import format_parser as parser formats = parser.parse(argv[1]) rgb_formats = [] for f in formats: if f.name == 'MESA_FORMAT_NONE': continue if f.colorspace not in ('rgb', 'srgb'): continue rgb_formats.append(f) %> /* float unpacking functions */ %for f in rgb_formats: %if f.name in ('MESA_FORMAT_R9G9B9E5_FLOAT', 'MESA_FORMAT_R11G11B10_FLOAT'): <% continue %> %elif f.is_int() and not f.is_normalized(): <% continue %> %elif f.is_compressed(): <% continue %> %endif static inline void unpack_float_${f.short_name()}(const void *void_src, GLfloat dst[4]) { ${f.datatype()} *src = (${f.datatype()} *)void_src; %if f.layout == parser.PACKED: %for c in f.channels: %if c.type != 'x': ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size}); %endif %endfor %elif f.layout == parser.ARRAY: %for (i, c) in enumerate(f.channels): %if c.type != 'x': ${c.datatype()} ${c.name} = src[${i}]; %endif %endfor %else: <% assert False %> %endif %for i in range(4): <% s = f.swizzle[i] %> %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W: <% c = f.channels[s] %> %if c.type == parser.UNSIGNED: %if f.colorspace == 'srgb' and c.name in 'rgb': <% assert c.size == 8 %> dst[${i}] = util_format_srgb_8unorm_to_linear_float(${c.name}); %else: dst[${i}] = _mesa_unorm_to_float(${c.name}, ${c.size}); %endif %elif c.type == parser.SIGNED: dst[${i}] = _mesa_snorm_to_float(${c.name}, ${c.size}); %elif c.type == parser.FLOAT: %if c.size == 32: dst[${i}] = ${c.name}; %elif c.size == 16: dst[${i}] = _mesa_half_to_float(${c.name}); %else: <% assert False %> %endif %else: <% assert False %> %endif %elif s == parser.Swizzle.SWIZZLE_ZERO: dst[${i}] = 0.0f; %elif s == parser.Swizzle.SWIZZLE_ONE: dst[${i}] = 1.0f; %else: <% assert False %> %endif %endfor } %endfor static void unpack_float_r9g9b9e5_float(const void *src, GLfloat dst[4]) { rgb9e5_to_float3(*(const GLuint *)src, dst); dst[3] = 1.0f; } static void unpack_float_r11g11b10_float(const void *src, GLfloat dst[4]) { r11g11b10f_to_float3(*(const GLuint *)src, dst); dst[3] = 1.0f; } static void unpack_float_ycbcr(const void *src, GLfloat dst[][4], GLuint n) { GLuint i; for (i = 0; i < n; i++) { const GLushort *src0 = ((const GLushort *) src) + i * 2; /* even */ const GLushort *src1 = src0 + 1; /* odd */ const GLubyte y0 = (*src0 >> 8) & 0xff; /* luminance */ const GLubyte cb = *src0 & 0xff; /* chroma U */ const GLubyte y1 = (*src1 >> 8) & 0xff; /* luminance */ const GLubyte cr = *src1 & 0xff; /* chroma V */ const GLubyte y = (i & 1) ? y1 : y0; /* choose even/odd luminance */ GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128); GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128); GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128); r *= (1.0F / 255.0F); g *= (1.0F / 255.0F); b *= (1.0F / 255.0F); dst[i][0] = CLAMP(r, 0.0F, 1.0F); dst[i][1] = CLAMP(g, 0.0F, 1.0F); dst[i][2] = CLAMP(b, 0.0F, 1.0F); dst[i][3] = 1.0F; } } static void unpack_float_ycbcr_rev(const void *src, GLfloat dst[][4], GLuint n) { GLuint i; for (i = 0; i < n; i++) { const GLushort *src0 = ((const GLushort *) src) + i * 2; /* even */ const GLushort *src1 = src0 + 1; /* odd */ const GLubyte y0 = *src0 & 0xff; /* luminance */ const GLubyte cr = (*src0 >> 8) & 0xff; /* chroma V */ const GLubyte y1 = *src1 & 0xff; /* luminance */ const GLubyte cb = (*src1 >> 8) & 0xff; /* chroma U */ const GLubyte y = (i & 1) ? y1 : y0; /* choose even/odd luminance */ GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128); GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128); GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128); r *= (1.0F / 255.0F); g *= (1.0F / 255.0F); b *= (1.0F / 255.0F); dst[i][0] = CLAMP(r, 0.0F, 1.0F); dst[i][1] = CLAMP(g, 0.0F, 1.0F); dst[i][2] = CLAMP(b, 0.0F, 1.0F); dst[i][3] = 1.0F; } } /* ubyte packing functions */ %for f in rgb_formats: %if not f.is_normalized(): <% continue %> %endif static inline void unpack_ubyte_${f.short_name()}(const void *void_src, GLubyte dst[4]) { ${f.datatype()} *src = (${f.datatype()} *)void_src; %if f.layout == parser.PACKED: %for c in f.channels: %if c.type != 'x': ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size}); %endif %endfor %elif f.layout == parser.ARRAY: %for (i, c) in enumerate(f.channels): %if c.type != 'x': ${c.datatype()} ${c.name} = src[${i}]; %endif %endfor %else: <% assert False %> %endif %for i in range(4): <% s = f.swizzle[i] %> %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W: <% c = f.channels[s] %> %if c.type == parser.UNSIGNED: %if f.colorspace == 'srgb' and c.name in 'rgb': <% assert c.size == 8 %> dst[${i}] = util_format_srgb_to_linear_8unorm(${c.name}); %else: dst[${i}] = _mesa_unorm_to_unorm(${c.name}, ${c.size}, 8); %endif %elif c.type == parser.SIGNED: dst[${i}] = _mesa_snorm_to_unorm(${c.name}, ${c.size}, 8); %elif c.type == parser.FLOAT: %if c.size == 32: dst[${i}] = _mesa_float_to_unorm(${c.name}, 8); %elif c.size == 16: dst[${i}] = _mesa_half_to_unorm(${c.name}, 8); %else: <% assert False %> %endif %else: <% assert False %> %endif %elif s == parser.Swizzle.SWIZZLE_ZERO: dst[${i}] = 0; %elif s == parser.Swizzle.SWIZZLE_ONE: dst[${i}] = 255; %else: <% assert False %> %endif %endfor } %endfor /* integer packing functions */ %for f in rgb_formats: %if not f.is_int(): <% continue %> %elif f.is_normalized(): <% continue %> %endif static inline void unpack_int_${f.short_name()}(const void *void_src, GLuint dst[4]) { ${f.datatype()} *src = (${f.datatype()} *)void_src; %if f.layout == parser.PACKED: %for c in f.channels: %if c.type != 'x': ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size}); %endif %endfor %elif f.layout == parser.ARRAY: %for (i, c) in enumerate(f.channels): %if c.type != 'x': ${c.datatype()} ${c.name} = src[${i}]; %endif %endfor %else: <% assert False %> %endif %for i in range(4): <% s = f.swizzle[i] %> %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W: dst[${i}] = ${f.channels[s].name}; %elif s == parser.Swizzle.SWIZZLE_ZERO: dst[${i}] = 0; %elif s == parser.Swizzle.SWIZZLE_ONE: dst[${i}] = 1; %else: <% assert False %> %endif %endfor } %endfor void _mesa_unpack_rgba_row(mesa_format format, GLuint n, const void *src, GLfloat dst[][4]) { GLubyte *s = (GLubyte *)src; GLuint i; switch (format) { %for f in rgb_formats: %if f.is_compressed(): <% continue %> %elif f.is_int() and not f.is_normalized(): <% continue %> %endif case ${f.name}: for (i = 0; i < n; ++i) { unpack_float_${f.short_name()}(s, dst[i]); s += ${f.block_size() / 8}; } break; %endfor case MESA_FORMAT_YCBCR: unpack_float_ycbcr(src, dst, n); break; case MESA_FORMAT_YCBCR_REV: unpack_float_ycbcr_rev(src, dst, n); break; default: _mesa_problem(NULL, "%s: bad format %s", __func__, _mesa_get_format_name(format)); return; } } void _mesa_unpack_ubyte_rgba_row(mesa_format format, GLuint n, const void *src, GLubyte dst[][4]) { GLubyte *s = (GLubyte *)src; GLuint i; switch (format) { %for f in rgb_formats: %if not f.is_normalized(): <% continue %> %endif case ${f.name}: for (i = 0; i < n; ++i) { unpack_ubyte_${f.short_name()}(s, dst[i]); s += ${f.block_size() / 8}; } break; %endfor default: /* get float values, convert to ubyte */ { GLfloat *tmp = malloc(n * 4 * sizeof(GLfloat)); if (tmp) { GLuint i; _mesa_unpack_rgba_row(format, n, src, (GLfloat (*)[4]) tmp); for (i = 0; i < n; i++) { dst[i][0] = _mesa_float_to_unorm(tmp[i*4+0], 8); dst[i][1] = _mesa_float_to_unorm(tmp[i*4+1], 8); dst[i][2] = _mesa_float_to_unorm(tmp[i*4+2], 8); dst[i][3] = _mesa_float_to_unorm(tmp[i*4+3], 8); } free(tmp); } } break; } } void _mesa_unpack_uint_rgba_row(mesa_format format, GLuint n, const void *src, GLuint dst[][4]) { GLubyte *s = (GLubyte *)src; GLuint i; switch (format) { %for f in rgb_formats: %if not f.is_int(): <% continue %> %elif f.is_normalized(): <% continue %> %endif case ${f.name}: for (i = 0; i < n; ++i) { unpack_int_${f.short_name()}(s, dst[i]); s += ${f.block_size() / 8}; } break; %endfor default: _mesa_problem(NULL, "%s: bad format %s", __func__, _mesa_get_format_name(format)); return; } } /** * Unpack a 2D rect of pixels returning float RGBA colors. * \param format the source image format * \param src start address of the source image * \param srcRowStride source image row stride in bytes * \param dst start address of the dest image * \param dstRowStride dest image row stride in bytes * \param x source image start X pos * \param y source image start Y pos * \param width width of rect region to convert * \param height height of rect region to convert */ void _mesa_unpack_rgba_block(mesa_format format, const void *src, GLint srcRowStride, GLfloat dst[][4], GLint dstRowStride, GLuint x, GLuint y, GLuint width, GLuint height) { const GLuint srcPixStride = _mesa_get_format_bytes(format); const GLuint dstPixStride = 4 * sizeof(GLfloat); const GLubyte *srcRow; GLubyte *dstRow; GLuint i; /* XXX needs to be fixed for compressed formats */ srcRow = ((const GLubyte *) src) + srcRowStride * y + srcPixStride * x; dstRow = ((GLubyte *) dst) + dstRowStride * y + dstPixStride * x; for (i = 0; i < height; i++) { _mesa_unpack_rgba_row(format, width, srcRow, (GLfloat (*)[4]) dstRow); dstRow += dstRowStride; srcRow += srcRowStride; } } /** Helper struct for MESA_FORMAT_Z32_FLOAT_S8X24_UINT */ struct z32f_x24s8 { float z; uint32_t x24s8; }; typedef void (*unpack_float_z_func)(GLuint n, const void *src, GLfloat *dst); static void unpack_float_z_X8_UINT_Z24_UNORM(GLuint n, const void *src, GLfloat *dst) { /* only return Z, not stencil data */ const GLuint *s = ((const GLuint *) src); const GLdouble scale = 1.0 / (GLdouble) 0xffffff; GLuint i; for (i = 0; i < n; i++) { dst[i] = (GLfloat) ((s[i] >> 8) * scale); assert(dst[i] >= 0.0F); assert(dst[i] <= 1.0F); } } static void unpack_float_z_Z24_UNORM_X8_UINT(GLuint n, const void *src, GLfloat *dst) { /* only return Z, not stencil data */ const GLuint *s = ((const GLuint *) src); const GLdouble scale = 1.0 / (GLdouble) 0xffffff; GLuint i; for (i = 0; i < n; i++) { dst[i] = (GLfloat) ((s[i] & 0x00ffffff) * scale); assert(dst[i] >= 0.0F); assert(dst[i] <= 1.0F); } } static void unpack_float_Z_UNORM16(GLuint n, const void *src, GLfloat *dst) { const GLushort *s = ((const GLushort *) src); GLuint i; for (i = 0; i < n; i++) { dst[i] = s[i] * (1.0F / 65535.0F); } } static void unpack_float_Z_UNORM32(GLuint n, const void *src, GLfloat *dst) { const GLuint *s = ((const GLuint *) src); GLuint i; for (i = 0; i < n; i++) { dst[i] = s[i] * (1.0F / 0xffffffff); } } static void unpack_float_Z_FLOAT32(GLuint n, const void *src, GLfloat *dst) { memcpy(dst, src, n * sizeof(float)); } static void unpack_float_z_Z32X24S8(GLuint n, const void *src, GLfloat *dst) { const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src; GLuint i; for (i = 0; i < n; i++) { dst[i] = s[i].z; } } /** * Unpack Z values. * The returned values will always be in the range [0.0, 1.0]. */ void _mesa_unpack_float_z_row(mesa_format format, GLuint n, const void *src, GLfloat *dst) { unpack_float_z_func unpack; switch (format) { case MESA_FORMAT_S8_UINT_Z24_UNORM: case MESA_FORMAT_X8_UINT_Z24_UNORM: unpack = unpack_float_z_X8_UINT_Z24_UNORM; break; case MESA_FORMAT_Z24_UNORM_S8_UINT: case MESA_FORMAT_Z24_UNORM_X8_UINT: unpack = unpack_float_z_Z24_UNORM_X8_UINT; break; case MESA_FORMAT_Z_UNORM16: unpack = unpack_float_Z_UNORM16; break; case MESA_FORMAT_Z_UNORM32: unpack = unpack_float_Z_UNORM32; break; case MESA_FORMAT_Z_FLOAT32: unpack = unpack_float_Z_FLOAT32; break; case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: unpack = unpack_float_z_Z32X24S8; break; default: _mesa_problem(NULL, "bad format %s in _mesa_unpack_float_z_row", _mesa_get_format_name(format)); return; } unpack(n, src, dst); } typedef void (*unpack_uint_z_func)(const void *src, GLuint *dst, GLuint n); static void unpack_uint_z_X8_UINT_Z24_UNORM(const void *src, GLuint *dst, GLuint n) { /* only return Z, not stencil data */ const GLuint *s = ((const GLuint *) src); GLuint i; for (i = 0; i < n; i++) { dst[i] = (s[i] & 0xffffff00) | (s[i] >> 24); } } static void unpack_uint_z_Z24_UNORM_X8_UINT(const void *src, GLuint *dst, GLuint n) { /* only return Z, not stencil data */ const GLuint *s = ((const GLuint *) src); GLuint i; for (i = 0; i < n; i++) { dst[i] = (s[i] << 8) | ((s[i] >> 16) & 0xff); } } static void unpack_uint_Z_UNORM16(const void *src, GLuint *dst, GLuint n) { const GLushort *s = ((const GLushort *)src); GLuint i; for (i = 0; i < n; i++) { dst[i] = (s[i] << 16) | s[i]; } } static void unpack_uint_Z_UNORM32(const void *src, GLuint *dst, GLuint n) { memcpy(dst, src, n * sizeof(GLuint)); } static void unpack_uint_Z_FLOAT32(const void *src, GLuint *dst, GLuint n) { const float *s = (const float *)src; GLuint i; for (i = 0; i < n; i++) { dst[i] = FLOAT_TO_UINT(CLAMP(s[i], 0.0F, 1.0F)); } } static void unpack_uint_Z_FLOAT32_X24S8(const void *src, GLuint *dst, GLuint n) { const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src; GLuint i; for (i = 0; i < n; i++) { dst[i] = FLOAT_TO_UINT(CLAMP(s[i].z, 0.0F, 1.0F)); } } /** * Unpack Z values. * The returned values will always be in the range [0, 0xffffffff]. */ void _mesa_unpack_uint_z_row(mesa_format format, GLuint n, const void *src, GLuint *dst) { unpack_uint_z_func unpack; const GLubyte *srcPtr = (GLubyte *) src; switch (format) { case MESA_FORMAT_S8_UINT_Z24_UNORM: case MESA_FORMAT_X8_UINT_Z24_UNORM: unpack = unpack_uint_z_X8_UINT_Z24_UNORM; break; case MESA_FORMAT_Z24_UNORM_S8_UINT: case MESA_FORMAT_Z24_UNORM_X8_UINT: unpack = unpack_uint_z_Z24_UNORM_X8_UINT; break; case MESA_FORMAT_Z_UNORM16: unpack = unpack_uint_Z_UNORM16; break; case MESA_FORMAT_Z_UNORM32: unpack = unpack_uint_Z_UNORM32; break; case MESA_FORMAT_Z_FLOAT32: unpack = unpack_uint_Z_FLOAT32; break; case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: unpack = unpack_uint_Z_FLOAT32_X24S8; break; default: _mesa_problem(NULL, "bad format %s in _mesa_unpack_uint_z_row", _mesa_get_format_name(format)); return; } unpack(srcPtr, dst, n); } static void unpack_ubyte_s_S_UINT8(const void *src, GLubyte *dst, GLuint n) { memcpy(dst, src, n); } static void unpack_ubyte_s_S8_UINT_Z24_UNORM(const void *src, GLubyte *dst, GLuint n) { GLuint i; const GLuint *src32 = src; for (i = 0; i < n; i++) dst[i] = src32[i] & 0xff; } static void unpack_ubyte_s_Z24_UNORM_S8_UINT(const void *src, GLubyte *dst, GLuint n) { GLuint i; const GLuint *src32 = src; for (i = 0; i < n; i++) dst[i] = src32[i] >> 24; } static void unpack_ubyte_s_Z32_FLOAT_S8X24_UINT(const void *src, GLubyte *dst, GLuint n) { GLuint i; const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src; for (i = 0; i < n; i++) dst[i] = s[i].x24s8 & 0xff; } void _mesa_unpack_ubyte_stencil_row(mesa_format format, GLuint n, const void *src, GLubyte *dst) { switch (format) { case MESA_FORMAT_S_UINT8: unpack_ubyte_s_S_UINT8(src, dst, n); break; case MESA_FORMAT_S8_UINT_Z24_UNORM: unpack_ubyte_s_S8_UINT_Z24_UNORM(src, dst, n); break; case MESA_FORMAT_Z24_UNORM_S8_UINT: unpack_ubyte_s_Z24_UNORM_S8_UINT(src, dst, n); break; case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: unpack_ubyte_s_Z32_FLOAT_S8X24_UINT(src, dst, n); break; default: _mesa_problem(NULL, "bad format %s in _mesa_unpack_ubyte_s_row", _mesa_get_format_name(format)); return; } } static void unpack_uint_24_8_depth_stencil_Z24_UNORM_S8_UINT(const GLuint *src, GLuint *dst, GLuint n) { GLuint i; for (i = 0; i < n; i++) { GLuint val = src[i]; dst[i] = val >> 24 | val << 8; } } static void unpack_uint_24_8_depth_stencil_Z32_S8X24(const GLuint *src, GLuint *dst, GLuint n) { GLuint i; for (i = 0; i < n; i++) { /* 8 bytes per pixel (float + uint32) */ GLfloat zf = ((GLfloat *) src)[i * 2 + 0]; GLuint z24 = (GLuint) (zf * (GLfloat) 0xffffff); GLuint s = src[i * 2 + 1] & 0xff; dst[i] = (z24 << 8) | s; } } static void unpack_uint_24_8_depth_stencil_S8_UINT_Z24_UNORM(const GLuint *src, GLuint *dst, GLuint n) { memcpy(dst, src, n * 4); } /** * Unpack depth/stencil returning as GL_UNSIGNED_INT_24_8. * \param format the source data format */ void _mesa_unpack_uint_24_8_depth_stencil_row(mesa_format format, GLuint n, const void *src, GLuint *dst) { switch (format) { case MESA_FORMAT_S8_UINT_Z24_UNORM: unpack_uint_24_8_depth_stencil_S8_UINT_Z24_UNORM(src, dst, n); break; case MESA_FORMAT_Z24_UNORM_S8_UINT: unpack_uint_24_8_depth_stencil_Z24_UNORM_S8_UINT(src, dst, n); break; case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: unpack_uint_24_8_depth_stencil_Z32_S8X24(src, dst, n); break; default: _mesa_problem(NULL, "bad format %s in _mesa_unpack_uint_24_8_depth_stencil_row", _mesa_get_format_name(format)); return; } } static void unpack_float_32_uint_24_8_Z24_UNORM_S8_UINT(const GLuint *src, GLuint *dst, GLuint n) { GLuint i; struct z32f_x24s8 *d = (struct z32f_x24s8 *) dst; const GLdouble scale = 1.0 / (GLdouble) 0xffffff; for (i = 0; i < n; i++) { const GLuint z24 = src[i] & 0xffffff; d[i].z = z24 * scale; d[i].x24s8 = src[i] >> 24; assert(d[i].z >= 0.0f); assert(d[i].z <= 1.0f); } } static void unpack_float_32_uint_24_8_Z32_FLOAT_S8X24_UINT(const GLuint *src, GLuint *dst, GLuint n) { memcpy(dst, src, n * sizeof(struct z32f_x24s8)); } static void unpack_float_32_uint_24_8_S8_UINT_Z24_UNORM(const GLuint *src, GLuint *dst, GLuint n) { GLuint i; struct z32f_x24s8 *d = (struct z32f_x24s8 *) dst; const GLdouble scale = 1.0 / (GLdouble) 0xffffff; for (i = 0; i < n; i++) { const GLuint z24 = src[i] >> 8; d[i].z = z24 * scale; d[i].x24s8 = src[i] & 0xff; assert(d[i].z >= 0.0f); assert(d[i].z <= 1.0f); } } /** * Unpack depth/stencil returning as GL_FLOAT_32_UNSIGNED_INT_24_8_REV. * \param format the source data format * * In GL_FLOAT_32_UNSIGNED_INT_24_8_REV lower 4 bytes contain float * component and higher 4 bytes contain packed 24-bit and 8-bit * components. * * 31 30 29 28 ... 4 3 2 1 0 31 30 29 ... 9 8 7 6 5 ... 2 1 0 * +-------------------------+ +--------------------------------+ * | Float Component | | Unused | 8 bit stencil | * +-------------------------+ +--------------------------------+ * lower 4 bytes higher 4 bytes */ void _mesa_unpack_float_32_uint_24_8_depth_stencil_row(mesa_format format, GLuint n, const void *src, GLuint *dst) { switch (format) { case MESA_FORMAT_S8_UINT_Z24_UNORM: unpack_float_32_uint_24_8_S8_UINT_Z24_UNORM(src, dst, n); break; case MESA_FORMAT_Z24_UNORM_S8_UINT: unpack_float_32_uint_24_8_Z24_UNORM_S8_UINT(src, dst, n); break; case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: unpack_float_32_uint_24_8_Z32_FLOAT_S8X24_UINT(src, dst, n); break; default: _mesa_problem(NULL, "bad format %s in _mesa_unpack_uint_24_8_depth_stencil_row", _mesa_get_format_name(format)); return; } } /** * Unpack depth/stencil * \param format the source data format * \param type the destination data type */ void _mesa_unpack_depth_stencil_row(mesa_format format, GLuint n, const void *src, GLenum type, GLuint *dst) { assert(type == GL_UNSIGNED_INT_24_8 || type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV); switch (type) { case GL_UNSIGNED_INT_24_8: _mesa_unpack_uint_24_8_depth_stencil_row(format, n, src, dst); break; case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: _mesa_unpack_float_32_uint_24_8_depth_stencil_row(format, n, src, dst); break; default: _mesa_problem(NULL, "bad type 0x%x in _mesa_unpack_depth_stencil_row", type); return; } } """ template = Template(string); print template.render(argv = argv[0:])