view test/testgl2.c @ 2884:9dde605c7540

Date: Fri, 19 Dec 2008 20:17:35 +0100 From: Couriersud Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions > For consistency you'd probably want: > SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a); > SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode); > SDL_RenderLine(int x1, int y1, int x2, int y2); > SDL_RenderFill(SDL_Rect *rect); > > You probably also want to add API functions query the current state. > I have implemented the above api for the opengl, x11, directfb and software renderers. I have also renamed *TEXTUREBLENDMODE* constants to BLENDMODE*. The unix build compiles. The windows renderer still needs to be updated, but I have no windows development machine at hand. Have a look at the x11 renderer for a sample. Vector games now run at 90% both on opengl and directfb in comparison to sdlmame's own opengl renderer. The same applies to raster games. The diff also includes a) Changed XDrawRect to XFillRect in x11 renderer b) A number of changes to fix blending and modulation issues in the directfb renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 12:00:00 +0000
parents 91e601d9df8b
children 82e60908fab1
line wrap: on
line source

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>

#include "common.h"

#ifdef __MACOS__
#define HAVE_OPENGL
#endif

#ifdef HAVE_OPENGL

#include "SDL_opengl.h"

/* Undefine this if you want a flat cube instead of a rainbow cube */
#define SHADED_CUBE

static CommonState *state;
static SDL_GLContext context;

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
    if (context) {
        /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
        SDL_GL_DeleteContext(context);
    }
    CommonQuit(state);
    exit(rc);
}

static void
Render()
{
    static float color[8][3] = {
        {1.0, 1.0, 0.0},
        {1.0, 0.0, 0.0},
        {0.0, 0.0, 0.0},
        {0.0, 1.0, 0.0},
        {0.0, 1.0, 1.0},
        {1.0, 1.0, 1.0},
        {1.0, 0.0, 1.0},
        {0.0, 0.0, 1.0}
    };
    static float cube[8][3] = {
        {0.5, 0.5, -0.5},
        {0.5, -0.5, -0.5},
        {-0.5, -0.5, -0.5},
        {-0.5, 0.5, -0.5},
        {-0.5, 0.5, 0.5},
        {0.5, 0.5, 0.5},
        {0.5, -0.5, 0.5},
        {-0.5, -0.5, 0.5}
    };

    /* Do our drawing, too. */
    glClearColor(0.0, 0.0, 0.0, 1.0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBegin(GL_QUADS);

#ifdef SHADED_CUBE
    glColor3fv(color[0]);
    glVertex3fv(cube[0]);
    glColor3fv(color[1]);
    glVertex3fv(cube[1]);
    glColor3fv(color[2]);
    glVertex3fv(cube[2]);
    glColor3fv(color[3]);
    glVertex3fv(cube[3]);

    glColor3fv(color[3]);
    glVertex3fv(cube[3]);
    glColor3fv(color[4]);
    glVertex3fv(cube[4]);
    glColor3fv(color[7]);
    glVertex3fv(cube[7]);
    glColor3fv(color[2]);
    glVertex3fv(cube[2]);

    glColor3fv(color[0]);
    glVertex3fv(cube[0]);
    glColor3fv(color[5]);
    glVertex3fv(cube[5]);
    glColor3fv(color[6]);
    glVertex3fv(cube[6]);
    glColor3fv(color[1]);
    glVertex3fv(cube[1]);

    glColor3fv(color[5]);
    glVertex3fv(cube[5]);
    glColor3fv(color[4]);
    glVertex3fv(cube[4]);
    glColor3fv(color[7]);
    glVertex3fv(cube[7]);
    glColor3fv(color[6]);
    glVertex3fv(cube[6]);

    glColor3fv(color[5]);
    glVertex3fv(cube[5]);
    glColor3fv(color[0]);
    glVertex3fv(cube[0]);
    glColor3fv(color[3]);
    glVertex3fv(cube[3]);
    glColor3fv(color[4]);
    glVertex3fv(cube[4]);

    glColor3fv(color[6]);
    glVertex3fv(cube[6]);
    glColor3fv(color[1]);
    glVertex3fv(cube[1]);
    glColor3fv(color[2]);
    glVertex3fv(cube[2]);
    glColor3fv(color[7]);
    glVertex3fv(cube[7]);
#else /* flat cube */
    glColor3f(1.0, 0.0, 0.0);
    glVertex3fv(cube[0]);
    glVertex3fv(cube[1]);
    glVertex3fv(cube[2]);
    glVertex3fv(cube[3]);

    glColor3f(0.0, 1.0, 0.0);
    glVertex3fv(cube[3]);
    glVertex3fv(cube[4]);
    glVertex3fv(cube[7]);
    glVertex3fv(cube[2]);

    glColor3f(0.0, 0.0, 1.0);
    glVertex3fv(cube[0]);
    glVertex3fv(cube[5]);
    glVertex3fv(cube[6]);
    glVertex3fv(cube[1]);

    glColor3f(0.0, 1.0, 1.0);
    glVertex3fv(cube[5]);
    glVertex3fv(cube[4]);
    glVertex3fv(cube[7]);
    glVertex3fv(cube[6]);

    glColor3f(1.0, 1.0, 0.0);
    glVertex3fv(cube[5]);
    glVertex3fv(cube[0]);
    glVertex3fv(cube[3]);
    glVertex3fv(cube[4]);

    glColor3f(1.0, 0.0, 1.0);
    glVertex3fv(cube[6]);
    glVertex3fv(cube[1]);
    glVertex3fv(cube[2]);
    glVertex3fv(cube[7]);
#endif /* SHADED_CUBE */

    glEnd();

    glMatrixMode(GL_MODELVIEW);
    glRotatef(5.0, 1.0, 1.0, 1.0);
}

int
main(int argc, char *argv[])
{
    int fsaa, accel;
    int value;
    int i, done;
    SDL_DisplayMode mode;
    SDL_Event event;
    Uint32 then, now, frames;

    /* Initialize parameters */
    fsaa = 0;
    accel = 0;

    /* Initialize test framework */
    state = CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }
    for (i = 1; i < argc;) {
        int consumed;

        consumed = CommonArg(state, i);
        if (consumed == 0) {
            if (SDL_strcasecmp(argv[i], "--fsaa") == 0) {
                ++fsaa;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--accel") == 0) {
                ++accel;
                consumed = 1;
            } else {
                consumed = -1;
            }
        }
        if (consumed < 0) {
            fprintf(stderr, "Usage: %s %s [--fsaa] [--accel]\n", argv[0],
                    CommonUsage(state));
            quit(1);
        }
        i += consumed;
    }

    /* Set OpenGL parameters */
    state->window_flags |= SDL_WINDOW_OPENGL;
    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
    if (fsaa) {
        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, fsaa);
    }
    if (accel) {
        SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
    }
    if (!CommonInit(state)) {
        quit(2);
    }

    /* Create OpenGL context */
    context = SDL_GL_CreateContext(state->windows[0]);
    if (!context) {
        fprintf(stderr, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
        quit(2);
    }

    if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
        SDL_GL_SetSwapInterval(1);
    } else {
        SDL_GL_SetSwapInterval(0);
    }

    SDL_GetCurrentDisplayMode(&mode);
    printf("Screen BPP: %d\n", SDL_BITSPERPIXEL(mode.format));
    printf("\n");
    printf("Vendor     : %s\n", glGetString(GL_VENDOR));
    printf("Renderer   : %s\n", glGetString(GL_RENDERER));
    printf("Version    : %s\n", glGetString(GL_VERSION));
    printf("Extensions : %s\n", glGetString(GL_EXTENSIONS));
    printf("\n");

    SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
    printf("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
    SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
    printf("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
    SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
    printf("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
    SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
    printf("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", 16, value);
    SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &value);
    printf("SDL_GL_DOUBLEBUFFER: requested 1, got %d\n", value);
    if (fsaa) {
        SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
        printf("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
        SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
        printf("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa,
               value);
    }
    if (accel) {
        SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
        printf("SDL_GL_ACCELERATED_VISUAL: requested 1, got %d\n", value);
    }

    /* Set rendering settings */
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-2.0, 2.0, -2.0, 2.0, -20.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glShadeModel(GL_SMOOTH);

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
    while (!done) {
        /* Check for events */
        ++frames;
        while (SDL_PollEvent(&event)) {
            CommonEvent(state, &event, &done);
        }
        for (i = 0; i < state->num_windows; ++i) {
            int w, h;
            SDL_GL_MakeCurrent(state->windows[i], context);
            SDL_GetWindowSize(state->windows[i], &w, &h);
            glViewport(0, 0, w, h);
            Render();
            SDL_GL_SwapWindow(state->windows[i]);
        }
    }

    /* Print out some timing information */
    now = SDL_GetTicks();
    if (now > then) {
        printf("%2.2f frames per second\n",
               ((double) frames * 1000) / (now - then));
    }
    quit(0);
    return 0;
}

#else /* HAVE_OPENGL */

int
main(int argc, char *argv[])
{
    printf("No OpenGL support on this system\n");
    return 1;
}

#endif /* HAVE_OPENGL */