summaryrefslogtreecommitdiff
path: root/glpong.c
diff options
context:
space:
mode:
Diffstat (limited to 'glpong.c')
-rw-r--r--glpong.c507
1 files changed, 231 insertions, 276 deletions
diff --git a/glpong.c b/glpong.c
index 6779a79..883d926 100644
--- a/glpong.c
+++ b/glpong.c
@@ -1,276 +1,231 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-
-#include "SDL.h"
-#include "SDL_opengl.h"
-#include "SDL_image.h"
-
-#include "glpong.h"
-
-int main(int argc, char * argv[]) {
- if (argc) {
- if (argv) {}
- }
-
- GLPong_Init();
-
- GLPong_PaddlesCreate();
-
- GLPong_BallAdd();
-
- while ( !GLPong.done ) {
- GLPong_HandleEvents();
- GLPong_Move();
- GLPong_Draw();
- SDL_Delay(10);
- }
- GLPong_CleanUp();
-
- return 0;
-}
-
-void GLPong_Init() {
- SDL_Surface * temp = NULL;
- Uint8 i;
- GLPong.done = 0;
-
- GLPong.w = 800;
- GLPong.h = 600;
-
- for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- GLPong.Balls[i] = NULL;
- }
-
- srand(time(NULL));
-
- SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE);
- atexit(SDL_Quit);
-
- SDL_WM_SetCaption("glPong", "glPong");
- temp = IMG_Load("ball.png");
- SDL_WM_SetIcon(temp, NULL);
- SDL_ShowCursor(SDL_DISABLE);
-
- SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 8);
- SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
-
- GLPong.Surface = SDL_SetVideoMode(GLPong.w, GLPong.h, 32, SDL_OPENGL);
- glViewport(0, 0, GLPong.w, GLPong.h);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0f, GLPong.w, GLPong.h, 0.0f, -1.0f, 1.0f);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
- glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
- glShadeModel(GL_SMOOTH);
- glClearDepth(2.0f);
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LEQUAL);
- glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
-
- GLPong.Event.type = SDL_NOEVENT;
-
- printf("OpenGL Vendor: %s\n", glGetString(GL_VENDOR));
- printf("OpenGL Renderer: %s\n", glGetString(GL_RENDERER));
- printf("OpenGL Version: %s\n", glGetString(GL_VERSION));
- printf("OpenGL Extensions: %s\n", glGetString(GL_EXTENSIONS));
-
- ball_texture = SDL_GL_SurfaceToTexture(temp);
- SDL_FreeSurface(temp);
-}
-
-void GLPong_HandleEvents() {
- if (SDL_PollEvent(&GLPong.Event) != 0) {
- if (GLPong.Event.type == SDL_QUIT) {
- GLPong.done = 1;
- return;
- }
- if (GLPong.Event.type == SDL_KEYDOWN) {
- if (GLPong.Event.key.keysym.sym == SDLK_ESCAPE) {
- GLPong.done = 1;
- return;
- } else if (GLPong.Event.key.keysym.sym == SDLK_SPACE) {
- GLPong_BallAdd();
- } else if (GLPong.Event.key.keysym.sym == SDLK_p) {
- for (;;) {
- SDL_Delay(10);
- if (SDL_PollEvent(&GLPong.Event) != 0) {
- if (GLPong.Event.type == SDL_QUIT) {
- GLPong.done = 1;
- return;
- } else if (GLPong.Event.type == SDL_KEYDOWN){
- if (GLPong.Event.key.keysym.sym == SDLK_ESCAPE) {
- GLPong.done = 1;
- return;
- } else if (GLPong.Event.key.keysym.sym == SDLK_p) {
- break;
- }
- }
- }
- }
- }
- }
- }
-}
-
-void GLPong_Draw() {
- Uint8 i;
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glBindTexture(GL_TEXTURE_2D, ball_texture);
- glEnable(GL_TEXTURE_2D);
- for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- if (GLPong.Balls[i] != NULL) {
- glLoadIdentity();
- glTranslatef(GLPong.Balls[i]->x, GLPong.Balls[i]->y, 0);
- glColor4f(GLPong.Balls[i]->r, GLPong.Balls[i]->g, GLPong.Balls[i]->b, GLPong.Balls[i]->a);
- glBegin(GL_QUADS);
- glTexCoord2f(0.0f, 1.0f); glVertex2f(GLPong.Balls[i]->w, GLPong.Balls[i]->h); /* Lower Left */
- glTexCoord2f(1.0f, 1.0f); glVertex2f(0.0f, GLPong.Balls[i]->h); /* Lower Right */
- glTexCoord2f(1.0f, 0.0f); glVertex2f(0.0f, 0.0f); /* Upper Right */
- glTexCoord2f(0.0f, 0.0f); glVertex2f(GLPong.Balls[i]->w, 0.0f); /* Upper Left */
- glEnd();
- }
- }
- glDisable(GL_TEXTURE_2D);
-
- SDL_GL_SwapBuffers();
-}
-
-void GLPong_CleanUp() {
- Uint8 i;
- for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- if (GLPong.Balls[i] != NULL) {
- free(GLPong.Balls[i]);
- GLPong.Balls[i] = NULL;
- }
- }
-}
-
-void GLPong_Move() {
- Uint8 i;
- Uint8 j;
- for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- if (GLPong.Balls[i] != NULL) {
- GLPong.Balls[i]->x += GLPong.Balls[i]->xv;
- GLPong.Balls[i]->y += GLPong.Balls[i]->yv;
- if ( GLPong.Balls[i]->y > (GLPong.h - GLPong.Balls[i]->h) || GLPong.Balls[i]->y < 0.0f ) {
- GLPong.Balls[i]->yv = -GLPong.Balls[i]->yv;
- }
- if ( GLPong.Balls[i]->x > (GLPong.w - GLPong.Balls[i]->w) || GLPong.Balls[i]->x < 0.0f ) {
- GLPong.Balls[i]->xv = -GLPong.Balls[i]->xv;
- }
- }
- }
- /*if (GLPong.Balls[1] != NULL) {
- if (GLPong_BallCollide(GLPong.Balls[0], GLPong.Balls[1])) {
- GLPong.Balls[0]->xv = -GLPong.Balls[0]->xv;
- GLPong.Balls[0]->yv = -GLPong.Balls[0]->yv;
- GLPong.Balls[1]->xv = -GLPong.Balls[1]->xv;
- GLPong.Balls[1]->yv = -GLPong.Balls[1]->yv;
- }
- }*/
-
- /*
- for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *) - 1; i++) {
- if (GLPong.Balls[i] != NULL) {
- for (j = i + i; j < sizeof(GLPong.Balls) / sizeof(void *); j++) {
- if (j != i && GLPong.Balls[j] != NULL) {
- if (GLPong_BallCollide(GLPong.Balls[i], GLPong.Balls[j])) {
- printf("%d - %d\n", i, j);
- GLPong.Balls[i]->xv *= -1;
- GLPong.Balls[i]->yv *= -1;
- GLPong.Balls[j]->xv *= -1;
- GLPong.Balls[j]->yv *= -1;
- }
- }
- }
- }
- }*/
- /*for (i = 0; i < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- if (GLPong.Balls[i] != NULL) {
- for (j = 0; j < sizeof(GLPong.Balls) / sizeof(void *); i++) {
- if (GLPong.Balls[j] != NULL && i != j) {
- if (GLPong_BallCollide(GLPong.Balls[i], GLPong.Balls[j])) {
- GLPong.Balls[i]->xv *= -1;
- GLPong.Balls[i]->yv *= -1;
- }
- }
- }
- }
- }*/
-}
-
-GLuint SDL_GL_SurfaceToTexture(SDL_Surface * surface) {
- Uint32 rmask, gmask, bmask, amask;
- SDL_Surface * temp = NULL;
- SDL_Surface * tempalpha = NULL;
- GLuint texture;
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
- rmask = 0xff000000;
- gmask = 0x00ff0000;
- bmask = 0x0000ff00;
- amask = 0x000000ff;
-#else
- rmask = 0x000000ff;
- gmask = 0x0000ff00;
- bmask = 0x00ff0000;
- amask = 0xff000000;
-#endif
- tempalpha = SDL_DisplayFormatAlpha(surface);
- SDL_SetAlpha(tempalpha, 0, SDL_ALPHA_TRANSPARENT);
- temp = SDL_CreateRGBSurface(SDL_SWSURFACE, surface->w, surface->h, 32, bmask, gmask, rmask, amask);
- SDL_FreeSurface(surface);
- SDL_BlitSurface(tempalpha, NULL, temp, NULL);
-
- SDL_FreeSurface(tempalpha);
-
- glGenTextures(1, &texture);
- glBindTexture(GL_TEXTURE_2D, texture);
- SDL_LockSurface(temp);
- glTexImage2D(GL_TEXTURE_2D, 0, 4, temp->w, temp->h, 0, GL_BGRA, GL_UNSIGNED_BYTE, temp->pixels);
- SDL_UnlockSurface(temp);
- SDL_FreeSurface(temp);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- return texture;
-}
-
-GLuint SDL_GL_NPOTSurfaceToTexture(SDL_Surface * surface, GLfloat * wratio, GLfloat * hratio) {
- SDL_Surface * pow2 = NULL;
- unsigned int w = NextPow2(surface->w);
- unsigned int h = NextPow2(surface->h);
- if (wratio) {
- *wratio = (GLfloat)surface->w / (GLfloat)h;
- }
- if (hratio) {
- *hratio = (GLfloat)surface->h/(GLfloat)h;
- }
-
- pow2 = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, surface->format->BitsPerPixel, surface->format->Rmask, surface->format->Gmask, surface->format->Bmask, surface->format->Amask);
- SDL_BlitSurface(surface, NULL, pow2, NULL);
- SDL_FreeSurface(surface);
-
- return SDL_GL_SurfaceToTexture(pow2);
-}
-
-__inline__ unsigned int NextPow2(unsigned int value) {
- unsigned int x;
- __asm("dec %1\n\t"
- "movl $2,%0\n\t"
- "bsr %1,%1\n\t"
- "shl %b1,%0\n\t"
- : "=r" (x)
- : "c" (value)
- );
- return x;
-}
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "SDL.h"
+#include "SDL_opengl.h"
+#include "SDL_image.h"
+
+#include "glpong.h"
+
+static int GLPong_Init(GLPong_t * GLPong);
+static int GLPong_HandleEvents();
+
+static GLuint SDL_GL_SurfaceToTexture(SDL_Surface * surface);
+static GLuint SDL_GL_NPOTSurfaceToTexture(SDL_Surface * surface, GLfloat * wratio, GLfloat * hratio);
+
+
+int main(int argc, char * argv[]) {
+ GLPong_t GLPong = {
+ NULL,
+ NULL,
+ GLPONG_WIDTH,
+ GLPONG_HEIGHT
+ };
+
+ int action;
+ int done = 0;
+
+ if (argc) {
+ if (argv) {}
+ }
+
+ if (GLPong_Init(&GLPong) < 0) {
+ fprintf(stderr, "Bailing out.\n");
+ return -1;
+ }
+
+#ifdef DEBUG
+ printf("%d balls\n", length(GLPong.balls));
+#endif
+ GLPong_BallAdd(&GLPong.balls); /* start with one ball */
+#ifdef DEBUG
+ printf("%d balls\n", length(GLPong.balls));
+#endif
+
+ while ( !done ) {
+ action = GLPong_HandleEvents();
+ switch (action) {
+ case GLPONG_EXIT: /* exit */
+ done = 1;
+ break;
+ case GLPONG_ADDBALL: /* add another ball */
+ GLPong_BallAdd(&GLPong.balls);
+ break;
+ }
+ GLPong_BallMoveAll(&GLPong.balls);
+
+ /* begin drawing */
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ GLPong_BallDrawAll(GLPong.balls);
+
+ SDL_GL_SwapBuffers();
+ /* end drawing */
+
+ SDL_Delay(10);
+ }
+
+ /* clean up */
+ GLPong_BallDeleteAll(GLPong.balls);
+
+ return 0;
+}
+
+static int
+GLPong_Init(GLPong_t * GLPong) {
+ SDL_Surface * temp = NULL;
+
+ srand(time(NULL));
+
+ if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {
+ fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
+ return -1;
+ }
+ atexit(SDL_Quit);
+
+ SDL_WM_SetCaption("glPong", "glPong");
+ SDL_ShowCursor(SDL_DISABLE);
+
+ temp = IMG_Load("ball.png");
+ if (!temp) {
+ fprintf(stderr, "Unable to open ball.png\n");
+ return -1;
+ }
+
+ SDL_WM_SetIcon(temp, NULL);
+
+ SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
+ SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
+ SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+ GLPong->Surface = SDL_SetVideoMode(GLPong->w, GLPong->h, 32, SDL_OPENGL);
+ if (!GLPong->Surface) {
+ fprintf(stderr, "Cannot SetVideoMode: %s\n", SDL_GetError());
+ return -1;
+ }
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0.0f, GLPong->w, 0.0f, GLPong->h, 0.0f, 1.0f);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+
+ printf("OpenGL Vendor: %s\n", glGetString(GL_VENDOR));
+ printf("OpenGL Renderer: %s\n", glGetString(GL_RENDERER));
+ printf("OpenGL Version: %s\n", glGetString(GL_VERSION));
+ printf("OpenGL Extensions: %s\n", glGetString(GL_EXTENSIONS));
+
+ ball_texture = SDL_GL_SurfaceToTexture(temp);
+ SDL_FreeSurface(temp);
+
+ return 0;
+}
+
+static int
+GLPong_HandleEvents() {
+ SDL_Event Event;
+
+ if (SDL_PollEvent(&Event) != 0) {
+ if (Event.type == SDL_QUIT) {
+ return GLPONG_EXIT;
+ }
+ if (Event.type == SDL_KEYDOWN) {
+ if (Event.key.keysym.sym == SDLK_ESCAPE) {
+ return GLPONG_EXIT;
+ } else if (Event.key.keysym.sym == SDLK_SPACE) {
+ return GLPONG_ADDBALL;
+ } else if (Event.key.keysym.sym == SDLK_p) {
+ for (;;) {
+ SDL_Delay(10);
+ if (SDL_PollEvent(&Event) != 0) {
+ if (Event.type == SDL_QUIT) {
+ return GLPONG_EXIT;
+ } else if (Event.type == SDL_KEYDOWN){
+ if (Event.key.keysym.sym == SDLK_ESCAPE) {
+ return GLPONG_EXIT;
+ } else if (Event.key.keysym.sym == SDLK_p) {
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ return GLPONG_NOACTION;
+}
+
+static INLINE unsigned int
+NextPow2(unsigned int value) {
+ unsigned int x;
+ __asm(
+ "dec %1 \n\t" /* so that if the number is a power of
+ * two we don't change it
+ */
+ "movl $2,%0 \n\t"
+ "bsr %1,%1 \n\t"
+ "shl %b1,%0 \n\t"
+ : "=r" (x)
+ : "c" (value)
+ );
+ return x;
+}
+
+static GLuint
+SDL_GL_SurfaceToTexture(SDL_Surface * surface) {
+ GLuint texture;
+
+ SDL_Surface * temp = SDL_CreateRGBSurface(
+ SDL_SWSURFACE,
+ surface->w,
+ surface->h,
+ 32,
+ BMASK,
+ GMASK,
+ RMASK,
+ AMASK
+ );
+
+ SDL_Surface * tempalpha = SDL_DisplayFormatAlpha(surface);
+ SDL_SetAlpha(tempalpha, 0, SDL_ALPHA_TRANSPARENT);
+ SDL_BlitSurface(tempalpha, NULL, temp, NULL);
+
+ SDL_FreeSurface(tempalpha);
+
+ glGenTextures(1, &texture);
+ glBindTexture(GL_TEXTURE_2D, texture);
+ SDL_LockSurface(temp);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, temp->w, temp->h, 0, GL_BGRA, GL_UNSIGNED_BYTE, temp->pixels);
+ SDL_UnlockSurface(temp);
+ SDL_FreeSurface(temp);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ return texture;
+}
+
+static GLuint
+SDL_GL_NPOTSurfaceToTexture(SDL_Surface * surface, GLfloat * wratio, GLfloat * hratio) {
+ SDL_Surface * pow2 = NULL;
+ unsigned int w = NextPow2(surface->w);
+ unsigned int h = NextPow2(surface->h);
+ if (wratio) {
+ *wratio = (GLfloat)surface->w / (GLfloat)h;
+ }
+ if (hratio) {
+ *hratio = (GLfloat)surface->h/(GLfloat)h;
+ }
+
+ pow2 = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, surface->format->BitsPerPixel, surface->format->Rmask, surface->format->Gmask, surface->format->Bmask, surface->format->Amask);
+ SDL_BlitSurface(surface, NULL, pow2, NULL);
+
+ return SDL_GL_SurfaceToTexture(pow2);
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-08 13:22:50 +0000