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https://github.com/AquariaOSE/Aquaria.git
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[vfs, #2] Move around some files (cleanup only)
This commit is contained in:
fgenesis
parent
a90f57afb0
commit
1709503344
8 changed files with 523 additions and 660 deletions
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@ -1,29 +1,29 @@
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/*
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* PNG loader library for OpenGL v1.45 (10/07/00)
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* by Ben Wyatt ben@wyatt100.freeserve.co.uk
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* Using LibPNG 1.0.2 and ZLib 1.1.3
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the author be held liable for any damages arising from the
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* use of this software.
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*
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* Permission is hereby granted to use, copy, modify, and distribute this
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* source code, or portions hereof, for any purpose, without fee, subject to
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* the following restrictions:
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*
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* 1. The origin of this source code must not be misrepresented. You must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered versions must be plainly marked as such and must not be
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* misrepresented as being the original source.
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* 3. This notice must not be removed or altered from any source distribution.
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*/
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* PNG loader library for OpenGL v1.45 (10/07/00)
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* by Ben Wyatt ben@wyatt100.freeserve.co.uk
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* Using LibPNG 1.0.2 and ZLib 1.1.3
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the author be held liable for any damages arising from the
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* use of this software.
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*
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* Permission is hereby granted to use, copy, modify, and distribute this
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* source code, or portions hereof, for any purpose, without fee, subject to
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* the following restrictions:
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*
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* 1. The origin of this source code must not be misrepresented. You must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered versions must be plainly marked as such and must not be
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* misrepresented as being the original source.
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* 3. This notice must not be removed or altered from any source distribution.
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*/
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#ifdef _WIN32 /* Stupid Windows needs to include windows.h before gl.h */
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#undef FAR
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#include <windows.h>
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#undef FAR
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#include <windows.h>
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#endif
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#include "../glpng.h"
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@ -55,17 +55,17 @@ static int PalettedTextures = -1;
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static GLint MaxTextureSize = 0;
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/* screenGamma = displayGamma/viewingGamma
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* displayGamma = CRT has gamma of ~2.2
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* viewingGamma depends on platform. PC is 1.0, Mac is 1.45, SGI defaults
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* to 1.7, but this can be checked and changed w/ /usr/sbin/gamma command.
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* If the environment variable VIEWING_GAMMA is set, adjust gamma per this value.
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*/
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* displayGamma = CRT has gamma of ~2.2
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* viewingGamma depends on platform. PC is 1.0, Mac is 1.45, SGI defaults
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* to 1.7, but this can be checked and changed w/ /usr/sbin/gamma command.
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* If the environment variable VIEWING_GAMMA is set, adjust gamma per this value.
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*/
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#ifdef _MAC
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static double screenGamma = 2.2 / 1.45;
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static double screenGamma = 2.2 / 1.45;
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#elif SGI
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static double screenGamma = 2.2 / 1.7;
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static double screenGamma = 2.2 / 1.7;
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#else /* PC/default */
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static double screenGamma = 2.2 / 1.0;
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static double screenGamma = 2.2 / 1.0;
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#endif
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static char gammaExplicit = 0; /*if */
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@ -259,8 +259,8 @@ int APIENTRY pngLoadRawF(FILE *fp, pngRawInfo *pinfo) {
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png_infop info;
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png_infop endinfo;
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png_bytep data;
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png_bytep *row_p;
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double fileGamma;
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png_bytep *row_p;
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double fileGamma;
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png_uint_32 width, height;
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int depth, color;
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@ -365,8 +365,8 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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png_infop info;
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png_infop endinfo;
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png_bytep data, data2;
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png_bytep *row_p;
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double fileGamma;
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png_bytep *row_p;
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double fileGamma;
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png_uint_32 width, height, rw, rh;
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int depth, color;
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@ -402,20 +402,20 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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if (MaxTextureSize == 0)
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxTextureSize);
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#ifdef SUPPORTS_PALETTE_EXT
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#ifdef _WIN32
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if (PalettedTextures == -1)
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PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL);
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#ifdef SUPPORTS_PALETTE_EXT
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#ifdef _WIN32
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if (PalettedTextures == -1)
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PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL);
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if (PalettedTextures) {
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if (glColorTableEXT == NULL) {
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glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
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if (glColorTableEXT == NULL)
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PalettedTextures = 0;
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}
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if (PalettedTextures) {
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if (glColorTableEXT == NULL) {
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glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
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if (glColorTableEXT == NULL)
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PalettedTextures = 0;
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}
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#endif
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#endif
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}
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#endif
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#endif
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if (PalettedTextures == -1)
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PalettedTextures = 0;
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@ -461,10 +461,10 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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data2 = (png_bytep) malloc(rw*rh*channels);
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/* Doesn't work on certain sizes */
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/* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0)
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return 0;
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*/
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/* Doesn't work on certain sizes */
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/* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0)
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return 0;
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*/
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Resize(channels, data, width, height, data2, rw, rh);
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width = rw, height = rh;
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@ -478,7 +478,7 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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glPixelStorei(GL_PACK_ALIGNMENT, 1);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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#ifdef SUPPORTS_PALETTE_EXT
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#ifdef SUPPORTS_PALETTE_EXT
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if (PalettedTextures && mipmap >= 0 && trans == PNG_SOLID && color == PNG_COLOR_TYPE_PALETTE) {
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png_colorp pal;
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int cols;
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@ -502,12 +502,12 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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glTexImage2D(GL_TEXTURE_2D, mipmap, intf, width, height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, data);
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}
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else
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#endif
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if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) {
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GLenum glformat;
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GLint glcomponent;
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#endif
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if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) {
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GLenum glformat;
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GLint glcomponent;
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switch (color) {
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switch (color) {
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case PNG_COLOR_TYPE_GRAY:
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case PNG_COLOR_TYPE_RGB:
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case PNG_COLOR_TYPE_PALETTE:
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@ -526,48 +526,48 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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default:
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/*puts("glformat not set");*/
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return 0;
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}
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if (trans == PNG_LUMINANCEALPHA)
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glformat = GL_LUMINANCE_ALPHA;
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if (mipmap == PNG_BUILDMIPMAPS)
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Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
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else if (mipmap == PNG_SIMPLEMIPMAPS)
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Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
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else
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glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
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}
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else {
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png_bytep p, endp, q;
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int r, g, b, a;
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if (trans == PNG_LUMINANCEALPHA)
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glformat = GL_LUMINANCE_ALPHA;
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p = data, endp = p+width*height*3;
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q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4);
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if (mipmap == PNG_BUILDMIPMAPS)
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Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
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else if (mipmap == PNG_SIMPLEMIPMAPS)
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Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
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else
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glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
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}
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else {
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png_bytep p, endp, q;
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int r, g, b, a;
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if (pinfo != NULL) pinfo->Alpha = 8;
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p = data, endp = p+width*height*3;
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q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4);
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#define FORSTART \
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do { \
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r = *p++; /*red */ \
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g = *p++; /*green*/ \
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b = *p++; /*blue */ \
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*q++ = r; \
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*q++ = g; \
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*q++ = b;
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if (pinfo != NULL) pinfo->Alpha = 8;
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#define FOREND \
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q++; \
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} while (p != endp);
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#define FORSTART \
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do { \
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r = *p++; /*red */ \
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g = *p++; /*green*/ \
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b = *p++; /*blue */ \
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*q++ = r; \
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*q++ = g; \
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*q++ = b;
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#define ALPHA *q
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#define FOREND \
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q++; \
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} while (p != endp);
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#define ALPHA *q
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switch (trans) {
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switch (trans) {
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case PNG_CALLBACKT:
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FORSTART
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ALPHA = AlphaCallback((unsigned char) r, (unsigned char) g, (unsigned char) b);
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FOREND
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break;
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break;
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case PNG_STENCIL:
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FORSTART
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@ -576,76 +576,76 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
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else
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ALPHA = 255;
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FOREND
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break;
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break;
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case PNG_BLEND1:
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FORSTART
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a = r+g+b;
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if (a > 255) ALPHA = 255; else ALPHA = a;
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if (a > 255) ALPHA = 255; else ALPHA = a;
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FOREND
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break;
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break;
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case PNG_BLEND2:
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FORSTART
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a = r+g+b;
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if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
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if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
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FOREND
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break;
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break;
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case PNG_BLEND3:
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FORSTART
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ALPHA = (r+g+b)/3;
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FOREND
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break;
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break;
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case PNG_BLEND4:
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FORSTART
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a = r*r+g*g+b*b;
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if (a > 255) ALPHA = 255; else ALPHA = a;
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if (a > 255) ALPHA = 255; else ALPHA = a;
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FOREND
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break;
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break;
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case PNG_BLEND5:
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FORSTART
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a = r*r+g*g+b*b;
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if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
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if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
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FOREND
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break;
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break;
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case PNG_BLEND6:
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FORSTART
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a = r*r+g*g+b*b;
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if (a > 255*3) ALPHA = 255; else ALPHA = a/3;
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if (a > 255*3) ALPHA = 255; else ALPHA = a/3;
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FOREND
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break;
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break;
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case PNG_BLEND7:
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FORSTART
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a = r*r+g*g+b*b;
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if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a);
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if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a);
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FOREND
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break;
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break;
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}
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#undef FORSTART
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#undef FOREND
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#undef ALPHA
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if (mipmap == PNG_BUILDMIPMAPS)
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Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
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else if (mipmap == PNG_SIMPLEMIPMAPS)
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Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
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else
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glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
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free(data2);
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}
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#undef FORSTART
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#undef FOREND
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#undef ALPHA
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if (mipmap == PNG_BUILDMIPMAPS)
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Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
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else if (mipmap == PNG_SIMPLEMIPMAPS)
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Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
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else
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glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
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free(data2);
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}
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glPixelStorei(GL_PACK_ALIGNMENT, pack);
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glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
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glPixelStorei(GL_PACK_ALIGNMENT, pack);
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glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
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} /* OpenGL end */
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png_read_end(png, endinfo);
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png_read_end(png, endinfo);
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png_destroy_read_struct(&png, &info, &endinfo);
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free(data);
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@ -684,6 +684,14 @@ unsigned int APIENTRY pngBindF(FILE *file, int mipmap, int trans, pngInfo *info,
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return 0;
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}
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unsigned int APIENTRY pngBindMem(const char *mem, int size, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter) {
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unsigned int id = SetParams(wrapst, magfilter, minfilter);
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if (id != 0 && pngLoadMem(mem, size, mipmap, trans, info))
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return id;
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return 0;
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}
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void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue) {
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StencilRed = red, StencilGreen = green, StencilBlue = blue;
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}
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@ -710,3 +718,329 @@ void APIENTRY pngSetStandardOrientation(int standardorientation) {
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StandardOrientation = standardorientation;
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}
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// -- added memory read functions --
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/*pointer to a new input function that takes as its
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arguments a pointer to a png_struct, a pointer to
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a location where input data can be stored, and a 32-bit
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unsigned int that is the number of bytes to be read.
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To exit and output any fatal error messages the new write
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function should call png_error(png_ptr, "Error msg"). */
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typedef struct glpng_memread_struct
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{
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png_bytep mem;
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png_size_t rpos;
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} glpng_memread;
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void glpng_read_mem(png_structp png, png_bytep dst, png_size_t size)
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{
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glpng_memread *mr = (glpng_memread*)png_get_io_ptr(png);
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memcpy(dst, mr->mem + mr->rpos, size);
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mr->rpos += size;
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}
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int APIENTRY pngLoadMem(const char *mem, int size, int mipmap, int trans, pngInfo *pinfo) {
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GLint pack, unpack;
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unsigned char header[8];
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png_structp png;
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png_infop info;
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png_infop endinfo;
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png_bytep data, data2;
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png_bytep *row_p;
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double fileGamma;
|
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|
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png_uint_32 width, height, rw, rh;
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int depth, color;
|
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|
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png_uint_32 i;
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glpng_memread memread;
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|
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if(size < 8)
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return 0; // error
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|
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memcpy(header, mem, 8);
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|
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if (!png_check_sig(header, 8))
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return 0;
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png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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info = png_create_info_struct(png);
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endinfo = png_create_info_struct(png);
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|
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// DH: added following lines
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if (setjmp(png_jmpbuf(png)))
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{
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png_destroy_read_struct(&png, &info, &endinfo);
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return 0;
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}
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// ~DH
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|
||||
memread.rpos = 0;
|
||||
memread.mem = ((png_bytep)mem) + 8;
|
||||
png_set_read_fn(png, &memread, glpng_read_mem);
|
||||
png_set_sig_bytes(png, 8);
|
||||
png_read_info(png, info);
|
||||
png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL);
|
||||
|
||||
if (pinfo != NULL) {
|
||||
pinfo->Width = width;
|
||||
pinfo->Height = height;
|
||||
pinfo->Depth = depth;
|
||||
}
|
||||
|
||||
if (MaxTextureSize == 0)
|
||||
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxTextureSize);
|
||||
|
||||
#ifdef SUPPORTS_PALETTE_EXT
|
||||
#ifdef _WIN32
|
||||
if (PalettedTextures == -1)
|
||||
PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL);
|
||||
|
||||
if (PalettedTextures) {
|
||||
if (glColorTableEXT == NULL) {
|
||||
glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
|
||||
if (glColorTableEXT == NULL)
|
||||
PalettedTextures = 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
if (PalettedTextures == -1)
|
||||
PalettedTextures = 0;
|
||||
|
||||
if (color == PNG_COLOR_TYPE_GRAY || color == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
png_set_gray_to_rgb(png);
|
||||
|
||||
if (color&PNG_COLOR_MASK_ALPHA && trans != PNG_ALPHA) {
|
||||
png_set_strip_alpha(png);
|
||||
color &= ~PNG_COLOR_MASK_ALPHA;
|
||||
}
|
||||
|
||||
if (!(PalettedTextures && mipmap >= 0 && trans == PNG_SOLID))
|
||||
if (color == PNG_COLOR_TYPE_PALETTE)
|
||||
png_set_expand(png);
|
||||
|
||||
/*--GAMMA--*/
|
||||
checkForGammaEnv();
|
||||
if (png_get_gAMA(png, info, &fileGamma))
|
||||
png_set_gamma(png, screenGamma, fileGamma);
|
||||
else
|
||||
png_set_gamma(png, screenGamma, 1.0/2.2);
|
||||
|
||||
png_read_update_info(png, info);
|
||||
|
||||
data = (png_bytep) malloc(png_get_rowbytes(png, info)*height);
|
||||
row_p = (png_bytep *) malloc(sizeof(png_bytep)*height);
|
||||
|
||||
for (i = 0; i < height; i++) {
|
||||
if (StandardOrientation)
|
||||
row_p[height - 1 - i] = &data[png_get_rowbytes(png, info)*i];
|
||||
else
|
||||
row_p[i] = &data[png_get_rowbytes(png, info)*i];
|
||||
}
|
||||
|
||||
png_read_image(png, row_p);
|
||||
free(row_p);
|
||||
|
||||
rw = SafeSize(width), rh = SafeSize(height);
|
||||
|
||||
if (rw != width || rh != height) {
|
||||
const int channels = png_get_rowbytes(png, info)/width;
|
||||
|
||||
data2 = (png_bytep) malloc(rw*rh*channels);
|
||||
|
||||
/* Doesn't work on certain sizes */
|
||||
/* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0)
|
||||
return 0;
|
||||
*/
|
||||
Resize(channels, data, width, height, data2, rw, rh);
|
||||
|
||||
width = rw, height = rh;
|
||||
free(data);
|
||||
data = data2;
|
||||
}
|
||||
|
||||
{ /* OpenGL stuff */
|
||||
glGetIntegerv(GL_PACK_ALIGNMENT, &pack);
|
||||
glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpack);
|
||||
glPixelStorei(GL_PACK_ALIGNMENT, 1);
|
||||
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
||||
|
||||
#ifdef SUPPORTS_PALETTE_EXT
|
||||
if (PalettedTextures && mipmap >= 0 && trans == PNG_SOLID && color == PNG_COLOR_TYPE_PALETTE) {
|
||||
png_colorp pal;
|
||||
int cols;
|
||||
GLint intf;
|
||||
|
||||
if (pinfo != NULL) pinfo->Alpha = 0;
|
||||
png_get_PLTE(png, info, &pal, &cols);
|
||||
|
||||
switch (cols) {
|
||||
case 1<<1: intf = GL_COLOR_INDEX1_EXT; break;
|
||||
case 1<<2: intf = GL_COLOR_INDEX2_EXT; break;
|
||||
case 1<<4: intf = GL_COLOR_INDEX4_EXT; break;
|
||||
case 1<<8: intf = GL_COLOR_INDEX8_EXT; break;
|
||||
case 1<<12: intf = GL_COLOR_INDEX12_EXT; break;
|
||||
case 1<<16: intf = GL_COLOR_INDEX16_EXT; break;
|
||||
default:
|
||||
/*printf("Warning: Colour depth %i not recognised\n", cols);*/
|
||||
return 0;
|
||||
}
|
||||
glColorTableEXT(GL_TEXTURE_2D, GL_RGB8, cols, GL_RGB, GL_UNSIGNED_BYTE, pal);
|
||||
glTexImage2D(GL_TEXTURE_2D, mipmap, intf, width, height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, data);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) {
|
||||
GLenum glformat;
|
||||
GLint glcomponent;
|
||||
|
||||
switch (color) {
|
||||
case PNG_COLOR_TYPE_GRAY:
|
||||
case PNG_COLOR_TYPE_RGB:
|
||||
case PNG_COLOR_TYPE_PALETTE:
|
||||
glformat = GL_RGB;
|
||||
glcomponent = 3;
|
||||
if (pinfo != NULL) pinfo->Alpha = 0;
|
||||
break;
|
||||
|
||||
case PNG_COLOR_TYPE_GRAY_ALPHA:
|
||||
case PNG_COLOR_TYPE_RGB_ALPHA:
|
||||
glformat = GL_RGBA;
|
||||
glcomponent = 4;
|
||||
if (pinfo != NULL) pinfo->Alpha = 8;
|
||||
break;
|
||||
|
||||
default:
|
||||
/*puts("glformat not set");*/
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (trans == PNG_LUMINANCEALPHA)
|
||||
glformat = GL_LUMINANCE_ALPHA;
|
||||
|
||||
if (mipmap == PNG_BUILDMIPMAPS)
|
||||
Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
|
||||
else if (mipmap == PNG_SIMPLEMIPMAPS)
|
||||
Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
|
||||
else
|
||||
glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
|
||||
}
|
||||
else {
|
||||
png_bytep p, endp, q;
|
||||
int r, g, b, a;
|
||||
|
||||
p = data, endp = p+width*height*3;
|
||||
q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4);
|
||||
|
||||
if (pinfo != NULL) pinfo->Alpha = 8;
|
||||
|
||||
#define FORSTART \
|
||||
do { \
|
||||
r = *p++; /*red */ \
|
||||
g = *p++; /*green*/ \
|
||||
b = *p++; /*blue */ \
|
||||
*q++ = r; \
|
||||
*q++ = g; \
|
||||
*q++ = b;
|
||||
|
||||
#define FOREND \
|
||||
q++; \
|
||||
} while (p != endp);
|
||||
|
||||
#define ALPHA *q
|
||||
|
||||
switch (trans) {
|
||||
case PNG_CALLBACKT:
|
||||
FORSTART
|
||||
ALPHA = AlphaCallback((unsigned char) r, (unsigned char) g, (unsigned char) b);
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_STENCIL:
|
||||
FORSTART
|
||||
if (r == StencilRed && g == StencilGreen && b == StencilBlue)
|
||||
ALPHA = 0;
|
||||
else
|
||||
ALPHA = 255;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND1:
|
||||
FORSTART
|
||||
a = r+g+b;
|
||||
if (a > 255) ALPHA = 255; else ALPHA = a;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND2:
|
||||
FORSTART
|
||||
a = r+g+b;
|
||||
if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND3:
|
||||
FORSTART
|
||||
ALPHA = (r+g+b)/3;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND4:
|
||||
FORSTART
|
||||
a = r*r+g*g+b*b;
|
||||
if (a > 255) ALPHA = 255; else ALPHA = a;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND5:
|
||||
FORSTART
|
||||
a = r*r+g*g+b*b;
|
||||
if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND6:
|
||||
FORSTART
|
||||
a = r*r+g*g+b*b;
|
||||
if (a > 255*3) ALPHA = 255; else ALPHA = a/3;
|
||||
FOREND
|
||||
break;
|
||||
|
||||
case PNG_BLEND7:
|
||||
FORSTART
|
||||
a = r*r+g*g+b*b;
|
||||
if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a);
|
||||
FOREND
|
||||
break;
|
||||
}
|
||||
|
||||
#undef FORSTART
|
||||
#undef FOREND
|
||||
#undef ALPHA
|
||||
|
||||
if (mipmap == PNG_BUILDMIPMAPS)
|
||||
Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
|
||||
else if (mipmap == PNG_SIMPLEMIPMAPS)
|
||||
Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
|
||||
else
|
||||
glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
|
||||
|
||||
free(data2);
|
||||
}
|
||||
|
||||
glPixelStorei(GL_PACK_ALIGNMENT, pack);
|
||||
glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
|
||||
} /* OpenGL end */
|
||||
|
||||
png_read_end(png, endinfo);
|
||||
png_destroy_read_struct(&png, &info, &endinfo);
|
||||
|
||||
free(data);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue