mirror of
https://github.com/AquariaOSE/Aquaria.git
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initial commit. This is icculus version 5542b94cae02a6333845854bbbd1abe0a259f1a4
This commit is contained in:
fgenesis
commit
3096eaf5e2
2519 changed files with 816064 additions and 0 deletions
719
ExternalLibs/glpng/glpng.c
Normal file
719
ExternalLibs/glpng/glpng.c
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@ -0,0 +1,719 @@
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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.
|
||||
* In no event will the author be held liable for any damages arising from the
|
||||
* use of this software.
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||||
*
|
||||
* Permission is hereby granted to use, copy, modify, and distribute this
|
||||
* source code, or portions hereof, for any purpose, without fee, subject to
|
||||
* the following restrictions:
|
||||
*
|
||||
* 1. The origin of this source code must not be misrepresented. You must not
|
||||
* claim that you wrote the original software. If you use this software in
|
||||
* a product, an acknowledgment in the product documentation would be
|
||||
* appreciated but is not required.
|
||||
* 2. Altered versions must be plainly marked as such and must not be
|
||||
* 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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#endif
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#include "../glpng.h"
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#include "gl.h"
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#include <stdlib.h>
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#include <math.h>
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#include "png/png.h"
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/* Used to decide if GL/gl.h supports the paletted extension */
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#ifdef GL_COLOR_INDEX1_EXT
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#define SUPPORTS_PALETTE_EXT
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#endif
|
||||
|
||||
static unsigned char DefaultAlphaCallback(unsigned char red, unsigned char green, unsigned char blue) {
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return 255;
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||||
}
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||||
|
||||
static unsigned char StencilRed = 0, StencilGreen = 0, StencilBlue = 0;
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static unsigned char (*AlphaCallback)(unsigned char red, unsigned char green, unsigned char blue) = DefaultAlphaCallback;
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static int StandardOrientation = 0;
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|
||||
#ifdef SUPPORTS_PALETTE_EXT
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#ifdef _WIN32
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static PFNGLCOLORTABLEEXTPROC glColorTableEXT = NULL;
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#endif
|
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#endif
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||||
|
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static int PalettedTextures = -1;
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static GLint MaxTextureSize = 0;
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|
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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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#ifdef _MAC
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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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#else /* PC/default */
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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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|
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static void checkForGammaEnv()
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{
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double viewingGamma;
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char *gammaEnv = getenv("VIEWING_GAMMA");
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|
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if(gammaEnv && !gammaExplicit)
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{
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sscanf(gammaEnv, "%lf", &viewingGamma);
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screenGamma = 2.2/viewingGamma;
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}
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||||
}
|
||||
|
||||
/* Returns a safe texture size to use (ie a power of 2), based on the current texture size "i" */
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static int SafeSize(int i) {
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int p;
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|
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if (i > MaxTextureSize) return MaxTextureSize;
|
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|
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for (p = 0; p < 24; p++)
|
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if (i <= (1<<p))
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return 1<<p;
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||||
|
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return MaxTextureSize;
|
||||
}
|
||||
|
||||
/* Resize the texture since gluScaleImage doesn't work on everything */
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static void Resize(int components, const png_bytep d1, int w1, int h1, png_bytep d2, int w2, int h2) {
|
||||
const float sx = (float) w1/w2, sy = (float) h1/h2;
|
||||
int x, y, xx, yy, c;
|
||||
png_bytep d;
|
||||
|
||||
for (y = 0; y < h2; y++) {
|
||||
yy = (int) (y*sy)*w1;
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||||
|
||||
for (x = 0; x < w2; x++) {
|
||||
xx = (int) (x*sx);
|
||||
d = d1 + (yy+xx)*components;
|
||||
|
||||
for (c = 0; c < components; c++)
|
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*d2++ = *d++;
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||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef SUPPORTS_PALETTE_EXT
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#ifdef _WIN32
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static int ExtSupported(const char *x) {
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static const GLubyte *ext = NULL;
|
||||
const char *c;
|
||||
int xlen = strlen(x);
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|
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if (ext == NULL) ext = glGetString(GL_EXTENSIONS);
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|
||||
c = (const char*)ext;
|
||||
|
||||
while (*c != '\0') {
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||||
if (strcmp(c, x) == 0 && (c[xlen] == '\0' || c[xlen] == ' ')) return 1;
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||||
c++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
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#endif
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||||
#endif
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||||
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||||
#define GET(o) ((int)*(data + (o)))
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||||
|
||||
static int HalfSize(GLint components, GLint width, GLint height, const unsigned char *data, unsigned char *d, int filter) {
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int x, y, c;
|
||||
int line = width*components;
|
||||
|
||||
if (width > 1 && height > 1) {
|
||||
if (filter)
|
||||
for (y = 0; y < height; y += 2) {
|
||||
for (x = 0; x < width; x += 2) {
|
||||
for (c = 0; c < components; c++) {
|
||||
*d++ = (GET(0)+GET(components)+GET(line)+GET(line+components)) / 4;
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data++;
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||||
}
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||||
data += components;
|
||||
}
|
||||
data += line;
|
||||
}
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||||
else
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for (y = 0; y < height; y += 2) {
|
||||
for (x = 0; x < width; x += 2) {
|
||||
for (c = 0; c < components; c++) {
|
||||
*d++ = GET(0);
|
||||
data++;
|
||||
}
|
||||
data += components;
|
||||
}
|
||||
data += line;
|
||||
}
|
||||
}
|
||||
else if (width > 1 && height == 1) {
|
||||
if (filter)
|
||||
for (y = 0; y < height; y += 1) {
|
||||
for (x = 0; x < width; x += 2) {
|
||||
for (c = 0; c < components; c++) {
|
||||
*d++ = (GET(0)+GET(components)) / 2;
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||||
data++;
|
||||
}
|
||||
data += components;
|
||||
}
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||||
}
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||||
else
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||||
for (y = 0; y < height; y += 1) {
|
||||
for (x = 0; x < width; x += 2) {
|
||||
for (c = 0; c < components; c++) {
|
||||
*d++ = GET(0);
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||||
data++;
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||||
}
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||||
data += components;
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||||
}
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||||
}
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||||
}
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||||
else if (width == 1 && height > 1) {
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||||
if (filter)
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||||
for (y = 0; y < height; y += 2) {
|
||||
for (x = 0; x < width; x += 1) {
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||||
for (c = 0; c < components; c++) {
|
||||
*d++ = (GET(0)+GET(line)) / 2;
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||||
data++;
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||||
}
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||||
}
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||||
data += line;
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||||
}
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||||
else
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for (y = 0; y < height; y += 2) {
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||||
for (x = 0; x < width; x += 1) {
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||||
for (c = 0; c < components; c++) {
|
||||
*d++ = GET(0);
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||||
data++;
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||||
}
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||||
}
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data += line;
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||||
}
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||||
}
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||||
else {
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||||
return 0;
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||||
}
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||||
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||||
return 1;
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||||
}
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||||
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||||
#undef GET
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||||
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||||
/* Replacement for gluBuild2DMipmaps so GLU isn't needed */
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static void Build2DMipmaps(GLint components, GLint width, GLint height, GLenum format, const unsigned char *data, int filter) {
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int level = 0;
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unsigned char *d = (unsigned char *) malloc((width/2)*(height/2)*components+4);
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const unsigned char *last = data;
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glTexImage2D(GL_TEXTURE_2D, level, components, width, height, 0, format, GL_UNSIGNED_BYTE, data);
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level++;
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while (HalfSize(components, width, height, last, d, filter)) {
|
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if (width > 1) width /= 2;
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if (height > 1) height /= 2;
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glTexImage2D(GL_TEXTURE_2D, level, components, width, height, 0, format, GL_UNSIGNED_BYTE, d);
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level++;
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last = d;
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}
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free(d);
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}
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int APIENTRY pngLoadRaw(const char *filename, pngRawInfo *pinfo) {
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int result;
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FILE *fp = fopen(filename, "rb");
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||||
if (fp == NULL) return 0;
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||||
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||||
result = pngLoadRawF(fp, pinfo);
|
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|
||||
if (fclose(fp) != 0) {
|
||||
if (result) {
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free(pinfo->Data);
|
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free(pinfo->Palette);
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||||
}
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return 0;
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||||
}
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return result;
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||||
}
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int APIENTRY pngLoadRawF(FILE *fp, pngRawInfo *pinfo) {
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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;
|
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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;
|
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int depth, color;
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png_uint_32 i;
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|
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if (pinfo == NULL) return 0;
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if (fread(header, 1, 8, fp) != 8) return 0;
|
||||
if (!png_check_sig(header, 8)) 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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||||
// DH: added following lines
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if (setjmp(png->jmpbuf))
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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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// ~DH
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||||
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png_init_io(png, fp);
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png_set_sig_bytes(png, 8);
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png_read_info(png, info);
|
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png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL);
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pinfo->Width = width;
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pinfo->Height = height;
|
||||
pinfo->Depth = depth;
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||||
|
||||
/*--GAMMA--*/
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checkForGammaEnv();
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||||
if (png_get_gAMA(png, info, &fileGamma))
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png_set_gamma(png, screenGamma, fileGamma);
|
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else
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png_set_gamma(png, screenGamma, 1.0/2.2);
|
||||
|
||||
png_read_update_info(png, info);
|
||||
|
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data = (png_bytep) malloc(png_get_rowbytes(png, info)*height);
|
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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);
|
||||
|
||||
if (color == PNG_COLOR_TYPE_PALETTE) {
|
||||
int cols;
|
||||
png_get_PLTE(png, info, (png_colorp *) &pinfo->Palette, &cols);
|
||||
}
|
||||
else {
|
||||
pinfo->Palette = NULL;
|
||||
}
|
||||
|
||||
if (color&PNG_COLOR_MASK_ALPHA) {
|
||||
if (color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
pinfo->Components = 2;
|
||||
else
|
||||
pinfo->Components = 4;
|
||||
pinfo->Alpha = 8;
|
||||
}
|
||||
else {
|
||||
if (color&PNG_COLOR_MASK_PALETTE || color == PNG_COLOR_TYPE_GRAY)
|
||||
pinfo->Components = 1;
|
||||
else
|
||||
pinfo->Components = 3;
|
||||
pinfo->Alpha = 0;
|
||||
}
|
||||
|
||||
pinfo->Data = data;
|
||||
|
||||
png_read_end(png, endinfo);
|
||||
png_destroy_read_struct(&png, &info, &endinfo);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int APIENTRY pngLoad(const char *filename, int mipmap, int trans, pngInfo *pinfo) {
|
||||
int result;
|
||||
FILE *fp = fopen(filename, "rb");
|
||||
if (fp == NULL) return 0;
|
||||
|
||||
result = pngLoadF(fp, mipmap, trans, pinfo);
|
||||
|
||||
if (fclose(fp) != 0) return 0;
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
|
||||
GLint pack, unpack;
|
||||
unsigned char header[8];
|
||||
png_structp png;
|
||||
png_infop info;
|
||||
png_infop endinfo;
|
||||
png_bytep data, data2;
|
||||
png_bytep *row_p;
|
||||
double fileGamma;
|
||||
|
||||
png_uint_32 width, height, rw, rh;
|
||||
int depth, color;
|
||||
|
||||
png_uint_32 i;
|
||||
|
||||
if (fread(header, 1, 8, fp) != 8) return 0;
|
||||
if (!png_check_sig(header, 8)) return 0;
|
||||
|
||||
png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
||||
info = png_create_info_struct(png);
|
||||
endinfo = png_create_info_struct(png);
|
||||
|
||||
// DH: added following lines
|
||||
if (setjmp(png->jmpbuf))
|
||||
{
|
||||
png_destroy_read_struct(&png, &info, &endinfo);
|
||||
return 0;
|
||||
}
|
||||
// ~DH
|
||||
|
||||
png_init_io(png, fp);
|
||||
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_CALLBACK:
|
||||
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;
|
||||
|
||||
//HACK: disabling this for now
|
||||
/*
|
||||
case PNG_BLEND7:
|
||||
FORSTART
|
||||
a = r*r+g*g+b*b;
|
||||
if (a > 255*255) ALPHA = 255; else ALPHA = (int) (sqrt(float(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;
|
||||
}
|
||||
|
||||
static unsigned int SetParams(int wrapst, int magfilter, int minfilter) {
|
||||
GLuint id;
|
||||
|
||||
glGenTextures(1, &id);
|
||||
glBindTexture(GL_TEXTURE_2D, id);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapst);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapst);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magfilter);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minfilter);
|
||||
|
||||
return id;
|
||||
}
|
||||
|
||||
unsigned int APIENTRY pngBind(const char *filename, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter) {
|
||||
unsigned int id = SetParams(wrapst, magfilter, minfilter);
|
||||
|
||||
if (id != 0 && pngLoad(filename, mipmap, trans, info))
|
||||
return id;
|
||||
return 0;
|
||||
}
|
||||
|
||||
unsigned int APIENTRY pngBindF(FILE *file, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter) {
|
||||
unsigned int id = SetParams(wrapst, magfilter, minfilter);
|
||||
|
||||
if (id != 0 && pngLoadF(file, mipmap, trans, info))
|
||||
return id;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue) {
|
||||
StencilRed = red, StencilGreen = green, StencilBlue = blue;
|
||||
}
|
||||
|
||||
void APIENTRY pngSetAlphaCallback(unsigned char (*callback)(unsigned char red, unsigned char green, unsigned char blue)) {
|
||||
if (callback == NULL)
|
||||
AlphaCallback = DefaultAlphaCallback;
|
||||
else
|
||||
AlphaCallback = callback;
|
||||
}
|
||||
|
||||
void APIENTRY pngSetViewingGamma(double viewingGamma) {
|
||||
if(viewingGamma > 0) {
|
||||
gammaExplicit = 1;
|
||||
screenGamma = 2.2/viewingGamma;
|
||||
}
|
||||
else {
|
||||
gammaExplicit = 0;
|
||||
screenGamma = 2.2;
|
||||
}
|
||||
}
|
||||
|
||||
void APIENTRY pngSetStandardOrientation(int standardorientation) {
|
||||
StandardOrientation = standardorientation;
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue