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#include <stdint.h>
#include "allfiles.h"
#include "zbuffer.h"
#include "fileset.h"
#include "moreio.h"
#include "newfatal.h"
#include "graphics.h"
zBufferData zBuffer;
extern int sceneWidth, sceneHeight;
void killZBuffer () {
if (zBuffer.tex) {
deleteTextures (1, &zBuffer.texName);
zBuffer.texName = 0;
delete zBuffer.tex;
zBuffer.tex = NULL;
}
zBuffer.numPanels = 0;
zBuffer.originalNum =0;
}
void sortZPal (int *oldpal, int *newpal, int size) {
int i, tmp;
for (i = 0; i < size; i ++) {
newpal[i] = i;
}
if (size < 2) return;
for (i = 1; i < size; i ++) {
if (oldpal[newpal[i]] < oldpal[newpal[i-1]]) {
tmp = newpal[i];
newpal[i] = newpal[i-1];
newpal[i-1] = tmp;
i = 0;
}
}
}
bool setZBuffer (int y) {
int x, n;
uint32_t stillToGo = 0;
int yPalette[16], sorted[16], sortback[16];
killZBuffer ();
setResourceForFatal (y);
zBuffer.originalNum = y;
if (! openFileFromNum (y)) return false;
if (fgetc (bigDataFile) != 'S') return fatal ("Not a Z-buffer file");
if (fgetc (bigDataFile) != 'z') return fatal ("Not a Z-buffer file");
if (fgetc (bigDataFile) != 'b') return fatal ("Not a Z-buffer file");
switch (fgetc (bigDataFile)) {
case 0:
zBuffer.width = 640;
zBuffer.height = 480;
break;
case 1:
zBuffer.width = get2bytes (bigDataFile);
zBuffer.height = get2bytes (bigDataFile);
break;
default:
return fatal ("Extended Z-buffer format not supported in this version of the SLUDGE engine");
}
if (zBuffer.width != sceneWidth || zBuffer.height != sceneHeight) {
char tmp[256];
sprintf (tmp, "Z-w: %d Z-h:%d w: %d, h:%d", zBuffer.width, zBuffer.height, sceneWidth, sceneHeight);
return fatal ("Z-buffer width and height don't match scene width and height", tmp);
}
zBuffer.numPanels = fgetc (bigDataFile);
for (y = 0; y < zBuffer.numPanels; y ++) {
yPalette[y] = get2bytes (bigDataFile);
}
sortZPal (yPalette, sorted, zBuffer.numPanels);
for (y = 0; y < zBuffer.numPanels; y ++) {
zBuffer.panel[y] = yPalette[sorted[y]];
sortback[sorted[y]] = y;
}
int picWidth = sceneWidth;
int picHeight = sceneHeight;
if (! NPOT_textures) {
picWidth = getNextPOT(picWidth);
picHeight = getNextPOT(picHeight);
}
zBuffer.tex = new GLubyte [picHeight*picWidth];
if (! checkNew (zBuffer.tex)) return false;
for (y = 0; y < sceneHeight; y ++) {
for (x = 0; x < sceneWidth; x ++) {
if (stillToGo == 0) {
n = fgetc (bigDataFile);
stillToGo = n >> 4;
if (stillToGo == 15) stillToGo = get2bytes (bigDataFile) + 16l;
else stillToGo ++;
n &= 15;
}
zBuffer.tex[y*picWidth + x] = sortback[n]*16;
stillToGo --;
}
}
finishAccess ();
setResourceForFatal (-1);
if (! zBuffer.texName) glGenTextures (1, &zBuffer.texName);
glBindTexture (GL_TEXTURE_2D, zBuffer.texName);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
texImage2D (GL_TEXTURE_2D, 0, GL_ALPHA, picWidth, picHeight, 0, GL_ALPHA, GL_UNSIGNED_BYTE, zBuffer.tex, zBuffer.texName);
return true;
}
void drawZBuffer(int x, int y, bool upsidedown) {
int i;
if (! zBuffer.tex) return;
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glColorMask (GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthMask (GL_TRUE);
glUseProgram(shader.texture);
setPMVMatrix(shader.texture);
//glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture (GL_TEXTURE_2D, zBuffer.texName);
setPrimaryColor(1.0, 1.0, 1.0, 1.0);
for (i = 1; i<zBuffer.numPanels; i++) {
GLfloat z = 1.0 - (double) i * (1.0 / 128.0);
GLfloat vy1 = -y, vy2 = zBuffer.height-y;
if (upsidedown) {
vy1 += zBuffer.height;
vy2 -= zBuffer.height;
}
const GLfloat vertices[] = {
(GLfloat)-x, vy1, z,
(GLfloat)zBuffer.width-x, vy1, z,
(GLfloat)-x, vy2, z,
(GLfloat)zBuffer.width-x, vy2, z
};
const GLfloat texCoords[] = {
0.0f, 0.0f,
backdropTexW, 0.0f,
0.0f, backdropTexH,
backdropTexW, backdropTexH
};
glUniform1i(glGetUniformLocation(shader.texture, "zBuffer"), 1);
glUniform1f(glGetUniformLocation(shader.texture, "zBufferLayer"), i);
drawQuad(shader.texture, vertices, 1, texCoords);
glUniform1i(glGetUniformLocation(shader.texture, "zBuffer"), 0);
}
glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthMask (GL_FALSE);
glDisable(GL_BLEND);
glUseProgram(0);
}
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