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Added a very simple example of texture streaming
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,238 @@ | ||
| /******************************************************************************** | ||
| * * | ||
| * Running moose :) Coded by Mike Gorchak. * | ||
| * * | ||
| ********************************************************************************/ | ||
|
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| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
|
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| #include "SDL.h" | ||
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| #define MOOSEPIC_W 64 | ||
| #define MOOSEPIC_H 88 | ||
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| #define MOOSEFRAME_SIZE (MOOSEPIC_W * MOOSEPIC_H) | ||
| #define MOOSEFRAMES_COUNT 10 | ||
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| SDL_Color MooseColors[84] = { | ||
| {49, 49, 49} | ||
| , {66, 24, 0} | ||
| , {66, 33, 0} | ||
| , {66, 66, 66} | ||
| , | ||
| {66, 115, 49} | ||
| , {74, 33, 0} | ||
| , {74, 41, 16} | ||
| , {82, 33, 8} | ||
| , | ||
| {82, 41, 8} | ||
| , {82, 49, 16} | ||
| , {82, 82, 82} | ||
| , {90, 41, 8} | ||
| , | ||
| {90, 41, 16} | ||
| , {90, 57, 24} | ||
| , {99, 49, 16} | ||
| , {99, 66, 24} | ||
| , | ||
| {99, 66, 33} | ||
| , {99, 74, 33} | ||
| , {107, 57, 24} | ||
| , {107, 82, 41} | ||
| , | ||
| {115, 57, 33} | ||
| , {115, 66, 33} | ||
| , {115, 66, 41} | ||
| , {115, 74, 0} | ||
| , | ||
| {115, 90, 49} | ||
| , {115, 115, 115} | ||
| , {123, 82, 0} | ||
| , {123, 99, 57} | ||
| , | ||
| {132, 66, 41} | ||
| , {132, 74, 41} | ||
| , {132, 90, 8} | ||
| , {132, 99, 33} | ||
| , | ||
| {132, 99, 66} | ||
| , {132, 107, 66} | ||
| , {140, 74, 49} | ||
| , {140, 99, 16} | ||
| , | ||
| {140, 107, 74} | ||
| , {140, 115, 74} | ||
| , {148, 107, 24} | ||
| , {148, 115, 82} | ||
| , | ||
| {148, 123, 74} | ||
| , {148, 123, 90} | ||
| , {156, 115, 33} | ||
| , {156, 115, 90} | ||
| , | ||
| {156, 123, 82} | ||
| , {156, 132, 82} | ||
| , {156, 132, 99} | ||
| , {156, 156, 156} | ||
| , | ||
| {165, 123, 49} | ||
| , {165, 123, 90} | ||
| , {165, 132, 82} | ||
| , {165, 132, 90} | ||
| , | ||
| {165, 132, 99} | ||
| , {165, 140, 90} | ||
| , {173, 132, 57} | ||
| , {173, 132, 99} | ||
| , | ||
| {173, 140, 107} | ||
| , {173, 140, 115} | ||
| , {173, 148, 99} | ||
| , {173, 173, 173} | ||
| , | ||
| {181, 140, 74} | ||
| , {181, 148, 115} | ||
| , {181, 148, 123} | ||
| , {181, 156, 107} | ||
| , | ||
| {189, 148, 123} | ||
| , {189, 156, 82} | ||
| , {189, 156, 123} | ||
| , {189, 156, 132} | ||
| , | ||
| {189, 189, 189} | ||
| , {198, 156, 123} | ||
| , {198, 165, 132} | ||
| , {206, 165, 99} | ||
| , | ||
| {206, 165, 132} | ||
| , {206, 173, 140} | ||
| , {206, 206, 206} | ||
| , {214, 173, 115} | ||
| , | ||
| {214, 173, 140} | ||
| , {222, 181, 148} | ||
| , {222, 189, 132} | ||
| , {222, 189, 156} | ||
| , | ||
| {222, 222, 222} | ||
| , {231, 198, 165} | ||
| , {231, 231, 231} | ||
| , {239, 206, 173} | ||
| }; | ||
|
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| Uint8 MooseFrames[MOOSEFRAMES_COUNT][MOOSEFRAME_SIZE]; | ||
|
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| /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ | ||
| static void | ||
| quit(int rc) | ||
| { | ||
| SDL_Quit(); | ||
| exit(rc); | ||
| } | ||
|
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| static void UpdateTexture(SDL_Texture *texture, int frame) | ||
| { | ||
| SDL_Color *color; | ||
| Uint8 *src; | ||
| Uint32 *dst; | ||
| int row, col; | ||
| void *pixels; | ||
| int pitch; | ||
|
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| if (SDL_LockTexture(texture, NULL, &pixels, &pitch) < 0) { | ||
| fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError()); | ||
| quit(5); | ||
| } | ||
| src = MooseFrames[frame]; | ||
| for (row = 0; row < MOOSEPIC_H; ++row) { | ||
| dst = (Uint32*)((Uint8*)pixels + row * pitch); | ||
| for (col = 0; col < MOOSEPIC_W; ++col) { | ||
| color = &MooseColors[*src++]; | ||
| *dst++ = (0xFF000000|(color->r<<16)|(color->g<<8)|color->b); | ||
| } | ||
| } | ||
| SDL_UnlockTexture(texture); | ||
| } | ||
|
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| int | ||
| main(int argc, char **argv) | ||
| { | ||
| SDL_Window *window; | ||
| SDL_Renderer *renderer; | ||
| SDL_RWops *handle; | ||
| SDL_Texture *MooseTexture; | ||
| SDL_Event event; | ||
| SDL_bool done = SDL_FALSE; | ||
| int frame; | ||
|
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| if (SDL_Init(SDL_INIT_VIDEO) < 0) { | ||
| fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); | ||
| return 1; | ||
| } | ||
|
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| /* load the moose images */ | ||
| handle = SDL_RWFromFile("moose.dat", "rb"); | ||
| if (handle == NULL) { | ||
| fprintf(stderr, "Can't find the file moose.dat !\n"); | ||
| quit(2); | ||
| } | ||
| SDL_RWread(handle, MooseFrames, MOOSEFRAME_SIZE, MOOSEFRAMES_COUNT); | ||
| SDL_RWclose(handle); | ||
|
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|
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| /* Create the window and renderer */ | ||
| window = SDL_CreateWindow("Happy Moose", | ||
| SDL_WINDOWPOS_UNDEFINED, | ||
| SDL_WINDOWPOS_UNDEFINED, | ||
| MOOSEPIC_W*4, MOOSEPIC_H*4, | ||
| SDL_WINDOW_SHOWN|SDL_WINDOW_RESIZABLE); | ||
| if (!window) { | ||
| fprintf(stderr, "Couldn't set create window: %s\n", SDL_GetError()); | ||
| quit(3); | ||
| } | ||
|
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| renderer = SDL_CreateRenderer(window, -1, 0); | ||
| if (!renderer) { | ||
| fprintf(stderr, "Couldn't set create renderer: %s\n", SDL_GetError()); | ||
| quit(4); | ||
| } | ||
|
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| MooseTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, MOOSEPIC_W, MOOSEPIC_H); | ||
| if (!MooseTexture) { | ||
| fprintf(stderr, "Couldn't set create texture: %s\n", SDL_GetError()); | ||
| quit(5); | ||
| } | ||
|
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| /* Loop, waiting for QUIT or the escape key */ | ||
| frame = 0; | ||
| while (!done) { | ||
| while (SDL_PollEvent(&event)) { | ||
| switch (event.type) { | ||
| case SDL_KEYDOWN: | ||
| if (event.key.keysym.sym == SDLK_ESCAPE) { | ||
| done = SDL_TRUE; | ||
| } | ||
| break; | ||
| case SDL_QUIT: | ||
| done = SDL_TRUE; | ||
| break; | ||
| } | ||
| } | ||
|
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| frame = (frame + 1) % MOOSEFRAMES_COUNT; | ||
| UpdateTexture(MooseTexture, frame); | ||
|
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| SDL_RenderClear(renderer); | ||
| SDL_RenderCopy(renderer, MooseTexture, NULL, NULL); | ||
| SDL_RenderPresent(renderer); | ||
| } | ||
| SDL_DestroyRenderer(renderer); | ||
|
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| quit(0); | ||
| return 0; | ||
| } | ||
|
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| /* vi: set ts=4 sw=4 expandtab: */ |