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[Change] Some openGL cleanup.

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This commit is contained in:
Allanis 2013-05-16 00:09:39 +01:00
parent 8f7ec2fa09
commit 6552fc2cf2
2 changed files with 36 additions and 22 deletions
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45
src/opengl.c
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@ -355,17 +355,18 @@ void gl_getSpriteFromDir(int* x, int* y, const glTexture* t, const double dir) {
// Blit the sprite at given position.
void gl_blitSprite(const glTexture* sprite, const double bx, const double by,
const int sx, const int sy, const glColour* c) {
// Don't bother drawing if offscreen -- waste of cycles.
if(fabs(bx-VX(*gl_camera)+gui_xoff) > gl_screen.w / 2 + sprite->sw / 2 ||
fabs(by-VY(*gl_camera)+gui_yoff) > gl_screen.h / 2 + sprite->sh / 2)
if(fabs(bx-VX(*gl_camera)+gui_xoff) > SCREEN_W / 2 + sprite->sw / 2 ||
fabs(by-VY(*gl_camera)+gui_yoff) > SCREEN_H / 2 + sprite->sh / 2)
return;
double x, y, tx, ty;
glEnable(GL_TEXTURE_2D);
x = bx - VX(*gl_camera) - sprite->sw/2. + gui_xoff;
y = by - VY(*gl_camera) - sprite->sh/2. + gui_yoff;
x = bx - (double)SCREEN_W/2.;
y = by - (double)SCREEN_H/2.;
tx = sprite->sw * (double)(sx)/sprite->rw;
ty = sprite->sh * (sprite->sy-(double)sy-1)/sprite->rh;
@ -578,8 +579,8 @@ static GLboolean gl_hasExt(char* name) {
}
// Check and report if there's been an error.
#ifndef gl_checkErr // I know, I know, it's a little hackish.
void gl_checkErr(void) {
#ifdef DEBUG
GLenum err;
char* errstr;
@ -614,8 +615,8 @@ void gl_checkErr(void) {
break;
}
WARN("OpenGL error: %s", errstr);
#endif
}
#endif
// Initialize SDL/OpenGL etc.
int gl_init(void) {
@ -648,8 +649,8 @@ int gl_init(void) {
DEBUG("Available fullscreen modes:");
for(i = 0; modes[i]; i++) {
DEBUG("\t%dx%d", modes[i]->w, modes[i]->h);
if((flags & SDL_FULLSCREEN) && (modes[i]->w == gl_screen.w) &&
(modes[i]->h == gl_screen.h))
if((flags & SDL_FULLSCREEN) && (modes[i]->w == SCREEN_W) &&
(modes[i]->h == SCREEN_H))
supported = 1; // Mode we asked for is supported.
}
}
@ -660,14 +661,15 @@ int gl_init(void) {
off = -1;
j = 0;
for(i = 0; modes[i]; i++) {
toff = ABS(gl_screen.w-modes[i]->w) + ABS(gl_screen.h-modes[i]->h);
toff = ABS(SCREEN_W-modes[i]->w) + ABS(SCREEN_H-modes[i]->h);
if((off == -1) || (toff < off)) {
j = i;
off = toff;
}
}
WARN("Fullscreen mode %dx%d is not supported by your setup\n"
" Switching to %dx%d", gl_screen.w, gl_screen.h,
" Switching to %dx%d",
SCREEN_W, SCREEN_H,
modes[j]->w, modes[j]->h);
gl_screen.w = modes[j]->w;
@ -676,18 +678,18 @@ int gl_init(void) {
}
// Test the setup - aim for 32.
depth = SDL_VideoModeOK(gl_screen.w, gl_screen.h, gl_screen.depth, flags);
depth = SDL_VideoModeOK(SCREEN_W, SCREEN_H, gl_screen.depth, flags);
if(depth == 0)
WARN("Video mode %dx%d @ %d bpp not supported"
" going to try to create it anyway...",
gl_screen.w, gl_screen.h, gl_screen.depth);
SCREEN_W, SCREEN_H, gl_screen.depth);
if(depth != gl_screen.depth)
LOG("Depth: %d bpp unavailable, will use %d bpp", gl_screen.depth, depth);
gl_screen.depth = depth;
// Actually creating the screen.
if(SDL_SetVideoMode(gl_screen.w, gl_screen.h, gl_screen.depth, flags) == NULL) {
if(SDL_SetVideoMode(SCREEN_W, SCREEN_H, gl_screen.depth, flags) == NULL) {
ERR("Unable to create OpenGL window: %s", SDL_GetError());
return -1;
}
@ -707,24 +709,31 @@ int gl_init(void) {
if(gl_hasExt("GL_ARB_fragment_shader")==GL_TRUE)
gl_screen.flags |= OPENGL_FRAG_SHADER;
// Max texture size.
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &gl_screen.tex_max);
// Debug heaven.
DEBUG("OpenGL Window Created: %dx%d@%dbpp %s", gl_screen.w, gl_screen.h,
DEBUG("OpenGL Window Created: %dx%d@%dbpp %s", SCREEN_W, SCREEN_H,
gl_screen.depth, (gl_has(OPENGL_FULLSCREEN)) ? "fullscreen" : "window");
DEBUG("r: %d, g: %d, b: %d, a: %d, doublebuffer: %s",
DEBUG("r: %d, g: %d, b: %d, a: %d, db: %s, tex: %d",
gl_screen.r, gl_screen.g, gl_screen.b, gl_screen.a,
(gl_has(OPENGL_DOUBLEBUF)) ? "yes" : "no");
gl_has(OPENGL_DOUBLEBUF) ? "yes" : "no",
gl_screen.tex_max);
DEBUG("Renderer: %s", glGetString(GL_RENDERER));
if(!gl_has(OPENGL_FRAG_SHADER))
DEBUG("No fragment shader extension detected");
DEBUG("");
// Some openGL options.
glClearColor(0., 0., 0., 1.);
glDisable(GL_DEPTH_TEST); // Set for doing 2D shidazles.
//glEnable(GL_TEXTURE_2D); // Don't enable globally, it will break non-texture blits.
glDisable(GL_LIGHTING); // No lighting, it is done when rendered.
glEnable(GL_BLEND);
glEnable(GL_BLEND); // Alpha blending ftw.
glShadeModel(GL_FLAT); // Default shade model. Functions should keep this when done..
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Good blend model.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-SCREEN_W /2, // Left edge.

5
src/opengl.h
View File

@ -32,6 +32,7 @@ typedef struct glInfo_ {
int depth; // Depth in bpp.
int r, g, b, a; // Framebuffer values in bits.
int flags; // Store different properties.
int tex_max; // Max texture size.
} glInfo;
extern glInfo gl_screen; // Local structure set with gl_init etc.
@ -79,5 +80,9 @@ void gl_exit(void);
int gl_isTrans(const glTexture* t, const int x, const int y);
void gl_getSpriteFromDir(int* x, int* y, const glTexture* t, const double dir);
void gl_screenshot(const char* filename);
#if DEBUG == 1
void gl_checkErr(void);
#else
#define gl_checkErr()
#endif