src_platform/sdl/bz/renderer/renderer.c

   1 #include <bz/renderer/renderer_internal.h>
   2
   3 #include <bz/gfx/gfx_internal.h>
   4 #include <bz/math/math.h>
   5 #include <bz/memory/allocator.h>
   6 #include <bz/renderer/palette_internal.h>
   7 #include <bz/renderer/render_pass_internal.h>
   8 #include <SDL.h>
   9
  10 struct BZRendererPass {
  11         size_t idx;
  12         BZRenderPassID pass;
  13 };
  14
  15 const static size_t kMaxRenderPasses = 8;
  16
  17 struct BZRenderer {
  18         BZRendererConfiguration configuration;
  19         SDL_Window *window;
  20         SDL_Renderer *renderer;
  21         SDL_Texture *renderTexture;
  22         SDL_Texture *renderTextureIntermediate;
  23         size_t intermediateWidth, intermediateHeight;
  24         int outputWidth, outputHeight;
  25         //static size_t numRenderPasses = 0;
  26         BZRendererPass rendererPasses[kMaxRenderPasses];
  27 };
  28
  29 BZRendererID bzRendererInit(BZMemoryArenaID arena, const BZRendererConfiguration *configuration, const char *title) {
  30         BZRendererID renderer = (BZRenderer *)bzMemoryAlloc(arena, sizeof(BZRenderer));
  31
  32         renderer->configuration = *configuration;
  33
  34         renderer->window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, configuration->outputWidth, configuration->outputHeight, SDL_WINDOW_ALLOW_HIGHDPI);
  35         if (renderer->window == NULL) {
  36                 bzError("Could not make window: SDL_Error='%s'", SDL_GetError());
  37                 return NULL;
  38         }
  39
  40         renderer->renderer = SDL_CreateRenderer(renderer->window, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED/*SDL_RENDERER_ACCELERATED*/);
  41
  42         //SDL_Surface *windowSurface =  SDL_GetWindowSurface(window);
  43         SDL_GetWindowSizeInPixels(renderer->window, &renderer->outputWidth, &renderer->outputHeight);
  44
  45         renderer->renderTexture = SDL_CreateTexture(renderer->renderer, SDL_PIXELFORMAT_ABGR8888/*SDL_PIXELFORMAT_RBZA8888*/, SDL_TEXTUREACCESS_STREAMING, configuration->rendererWidth, configuration->rendererHeight);
  46
  47         renderer->intermediateWidth = configuration->rendererWidth * bzFloor((renderer->outputWidth / configuration->rendererWidth) + 1);
  48         renderer->intermediateHeight = configuration->rendererHeight * bzFloor((renderer->outputHeight / configuration->rendererHeight) + 1);
  49         renderer->renderTextureIntermediate = SDL_CreateTexture(renderer->renderer, SDL_PIXELFORMAT_ABGR8888/*SDL_PIXELFORMAT_RBZA8888*/, SDL_TEXTUREACCESS_TARGET, renderer->intermediateWidth, renderer->intermediateHeight);
  50         SDL_SetTextureScaleMode(renderer->renderTextureIntermediate, SDL_ScaleModeBest);
  51
  52 //      drawSurface/*tmpSurface*/ = SDL_CreateRBZSurface(0, RENDERER_WIDTH, RENDERER_HEIGHT, windowSurface->format->BytesPerPixel * 8, windowSurface->format->Rmask, windowSurface->format->Gmask, windowSurface->format->Bmask, windowSurface->format->Amask);
  53         //drawSurface = SDL_CreateRBZSurface(0, RENDERER_WIDTH, RENDERER_HEIGHT, 8, 0, 0, 0, 0);
  54
  55         for (size_t i = 0; i < kMaxRenderPasses; ++i) {
  56                 renderer->rendererPasses[i].pass = NULL;
  57         }
  58
  59         SDL_ShowCursor(SDL_DISABLE);
  60
  61         bzGfxPreparePalettes(arena, 8, configuration->palette->numColors);
  62         bzGfxPrepareCanvasBuffer(arena, configuration->gameWidth, configuration->gameHeight);
  63
  64         return renderer;
  65 }
  66
  67 void bzRendererTeardown(BZRendererID renderer) {
  68         SDL_DestroyWindow(renderer->window);
  69 }
  70
  71 BZRendererPassID bzRendererRegisterPass(BZRendererID renderer, BZRenderPassID renderPass) {
  72         for (size_t i = 0; i < kMaxRenderPasses; ++i) {
  73                 if (renderer->rendererPasses[i].pass == NULL) {
  74                         renderer->rendererPasses[i].pass = renderPass;
  75                         return &renderer->rendererPasses[i];
  76                 }
  77         }
  78         return NULL;
  79 }
  80
  81 void bzRendererUnregisterPass(BZRendererPassID rendererPass) {
  82         rendererPass->pass = NULL;
  83 }
  84
  85 void bzRendererBlit(BZRendererID renderer) {
  86         //SDL_LockSurface(drawSurface);
  87
  88         //SDL_Rect srcRect = { .x = 0, .y = 0, .w = drawSurface->w,   .h = drawSurface->h };
  89         void *pixels;
  90         int pitch;
  91
  92         SDL_LockTexture(renderer->renderTexture, NULL, &pixels, &pitch);
  93
  94         for (size_t i = 0; i < kMaxRenderPasses; ++i) {
  95                 BZRenderPass *renderPass = renderer->rendererPasses[i].pass;
  96                 if (renderPass != NULL) {
  97                         if (renderPass->softwareHook != NULL) {
  98                                 renderPass->softwareHook(renderer->configuration.palette, (uint32_t *)pixels/*drawSurface->pixels*/, renderer->configuration.gameWidth, renderer->configuration.gameHeight, renderer->configuration.rendererWidth / renderer->configuration.gameWidth, renderer->configuration.rendererHeight / renderer->configuration.gameHeight);
  99                         }
 100                 }
 101         }
 102
 103         //SDL_UnlockSurface(drawSurface);
 104
 105         SDL_UnlockTexture(renderer->renderTexture);
 106
 107         //SDL_Rect srcRect = { .x = 0, .y = 0, .w = drawSurface->w,   .h = drawSurface->h };
 108         //SDL_Rect dstRect = { .x = 0, .y = 0, .w = windowSurface->w, .h = windowSurface->h};
 109         //SDL_FillRect(windowSurface, &dstRect, 100);
 110 //      int zis = SDL_BlitSurface(drawSurface, &srcRect, tmpSurface, &srcRect);
 111 //      int zi = SDL_BlitScaled(drawSurface, &srcRect, windowSurface, &dstRect);
 112
 113         //SDL_SetRenderTarget(renderer, NULL);
 114         //SDL_RenderClear(renderer);
 115
 116         SDL_SetRenderTarget(renderer->renderer, renderer->renderTextureIntermediate);
 117         //renderTextureIntermediate
 118         SDL_RenderCopyEx(renderer->renderer, renderer->renderTexture, NULL, NULL, 0, NULL, 0);
 119         SDL_SetRenderTarget(renderer->renderer, NULL);
 120
 121
 122         //SDL_RenderCopyEx(renderer, renderTextureIntermediate, NULL, NULL, 0, NULL, 0);
 123
 124
 125 //      SDL_RenderPresent(renderer);
 126         //SDL_RenderPresent(renderer);
 127         //SDL_SetRenderTarget(renderer, renderTexture);
 128
 129         //SDL_UpdateWindowSurface(window);
 130         //SDL_UpdateWindowSurface(window);
 131         //SDL_UpdateWindowSurface(window);
 132 }
 133
 134 void bzRendererVBlank(BZRendererID renderer) {
 135         SDL_RenderClear(renderer->renderer);
 136         size_t height = (size_t)((float)renderer->outputWidth * (float)renderer->configuration.rendererHeight / (float)renderer->configuration.rendererWidth);
 137         SDL_Rect dstRect = { .x = 0, .y = (renderer->outputHeight - height) / 2, .w = renderer->outputWidth, .h = height };
 138         SDL_RenderCopyEx(renderer->renderer, renderer->renderTextureIntermediate, NULL, &dstRect, 0, NULL, 0);
 139         SDL_RenderPresent(renderer->renderer);
 140 }