this repo has no description
Added simple font code for use in the demos.
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demos/CMakeLists.txt
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demos/CMakeLists.txt
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include_directories(${SDL_gpu_SOURCE_DIR}/SDL_gpu/OpenGL_common)
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include_directories(${SDL_gpu_SOURCE_DIR}/demos/common)
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add_executable(init-demo init/main.c common/common.c)
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add_executable(init-demo init/main.c common/common.c common/demo-font.c)
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target_link_libraries (init-demo SDL_gpu)
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add_executable(create-demo create/main.c common/common.c)
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add_executable(create-demo create/main.c common/common.c common/demo-font.c)
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target_link_libraries (create-demo SDL_gpu)
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add_executable(get-pixel-demo get-pixel/main.c common/common.c)
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add_executable(get-pixel-demo get-pixel/main.c common/common.c common/demo-font.c)
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target_link_libraries (get-pixel-demo SDL_gpu)
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add_executable(scale-demo scale/main.c common/common.c)
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add_executable(scale-demo scale/main.c common/common.c common/demo-font.c)
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target_link_libraries (scale-demo SDL_gpu)
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add_executable(transform-demo transform/main.c common/common.c)
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add_executable(transform-demo transform/main.c common/common.c common/demo-font.c)
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target_link_libraries (transform-demo SDL_gpu)
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add_executable(sprite-demo sprite/main.c common/common.c)
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add_executable(sprite-demo sprite/main.c common/common.c common/demo-font.c)
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target_link_libraries (sprite-demo SDL_gpu)
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add_executable(sprite-stress-demo sprite-stress/main.c common/common.c)
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add_executable(sprite-stress-demo sprite-stress/main.c common/common.c common/demo-font.c)
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target_link_libraries (sprite-stress-demo SDL_gpu)
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add_executable(rotate-demo rotate/main.c common/common.c)
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add_executable(rotate-demo rotate/main.c common/common.c common/demo-font.c)
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target_link_libraries (rotate-demo SDL_gpu)
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add_executable(render-target-demo render-target/main.c common/common.c)
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add_executable(render-target-demo render-target/main.c common/common.c common/demo-font.c)
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target_link_libraries (render-target-demo SDL_gpu)
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add_executable(blend-demo blend/main.c common/common.c)
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add_executable(blend-demo blend/main.c common/common.c common/demo-font.c)
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target_link_libraries (blend-demo SDL_gpu)
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add_executable(blend-mode-demo blend-mode/main.c common/common.c)
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add_executable(blend-mode-demo blend-mode/main.c common/common.c common/demo-font.c)
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target_link_libraries (blend-mode-demo SDL_gpu)
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add_executable(shapes-demo shapes/main.c common/common.c)
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add_executable(shapes-demo shapes/main.c common/common.c common/demo-font.c)
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target_link_libraries (shapes-demo SDL_gpu)
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add_executable(clip-demo clip/main.c common/common.c)
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add_executable(clip-demo clip/main.c common/common.c common/demo-font.c)
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target_link_libraries (clip-demo SDL_gpu)
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add_executable(color-demo color/main.c common/common.c)
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add_executable(color-demo color/main.c common/common.c common/demo-font.c)
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target_link_libraries (color-demo SDL_gpu)
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add_executable(mipmap-demo mipmap/main.c common/common.c)
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add_executable(mipmap-demo mipmap/main.c common/common.c common/demo-font.c)
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target_link_libraries (mipmap-demo SDL_gpu)
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add_executable(polygon-blit-demo polygon-blit/main.c common/common.c)
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add_executable(polygon-blit-demo polygon-blit/main.c common/common.c common/demo-font.c)
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target_link_libraries (polygon-blit-demo SDL_gpu)
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add_executable(camera-demo camera/main.c common/common.c)
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add_executable(camera-demo camera/main.c common/common.c common/demo-font.c)
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target_link_libraries (camera-demo SDL_gpu)
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add_executable(virtual-resolution-demo virtual-resolution/main.c common/common.c)
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add_executable(virtual-resolution-demo virtual-resolution/main.c common/common.c common/demo-font.c)
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target_link_libraries (virtual-resolution-demo SDL_gpu)
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add_executable(transformx-demo transformx/main.c common/common.c)
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add_executable(transformx-demo transformx/main.c common/common.c common/demo-font.c)
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target_link_libraries (transformx-demo SDL_gpu)
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add_executable(transform-matrix-demo transform-matrix/main.c common/common.c)
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add_executable(transform-matrix-demo transform-matrix/main.c common/common.c common/demo-font.c)
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target_link_libraries (transform-matrix-demo SDL_gpu)
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add_executable(copy-demo copy/main.c common/common.c)
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add_executable(copy-demo copy/main.c common/common.c common/demo-font.c)
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target_link_libraries (copy-demo SDL_gpu)
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add_executable(npot-demo npot/main.c common/common.c)
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add_executable(npot-demo npot/main.c common/common.c common/demo-font.c)
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target_link_libraries (npot-demo SDL_gpu)
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add_executable(subsurface-demo subsurface/main.c common/common.c)
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add_executable(subsurface-demo subsurface/main.c common/common.c common/demo-font.c)
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target_link_libraries (subsurface-demo SDL_gpu)
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add_executable(features-demo features/main.c common/common.c)
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add_executable(features-demo features/main.c common/common.c common/demo-font.c)
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target_link_libraries (features-demo SDL_gpu)
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add_executable(save-demo save/main.c common/common.c)
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add_executable(save-demo save/main.c common/common.c common/demo-font.c)
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target_link_libraries (save-demo SDL_gpu)
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add_executable(shader-demo shader/main.c common/common.c)
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add_executable(shader-demo shader/main.c common/common.c common/demo-font.c)
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target_link_libraries (shader-demo SDL_gpu)
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add_executable(3d-demo 3d/main.c common/common.c)
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add_executable(3d-demo 3d/main.c common/common.c common/demo-font.c)
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target_link_libraries (3d-demo SDL_gpu)
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add_executable(windows-demo windows/main.c common/common.c)
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add_executable(windows-demo windows/main.c common/common.c common/demo-font.c)
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target_link_libraries (windows-demo SDL_gpu)
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add_executable(windows2-demo windows2/main.c common/common.c)
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add_executable(windows2-demo windows2/main.c common/common.c common/demo-font.c)
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target_link_libraries (windows2-demo SDL_gpu)
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add_executable(shader-attributes-demo shader-attributes/main.c common/common.c)
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add_executable(shader-attributes-demo shader-attributes/main.c common/common.c common/demo-font.c)
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target_link_libraries (shader-attributes-demo SDL_gpu)
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add_executable(blit-batch-demo blit-batch/main.c common/common.c)
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add_executable(blit-batch-demo blit-batch/main.c common/common.c common/demo-font.c)
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target_link_libraries (blit-batch-demo SDL_gpu)
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demos/common/demo-font.c
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demos/common/demo-font.c
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#include "demo-font.h"
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static Uint32 _GetPixel(SDL_Surface *Surface, int x, int y)
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{
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Uint8* bits;
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Uint32 bpp;
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if(x < 0 || x >= Surface->w)
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return 0; // Best I could do for errors
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bpp = Surface->format->BytesPerPixel;
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bits = ((Uint8*)Surface->pixels) + y*Surface->pitch + x*bpp;
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Uint8 r, g, b;
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switch (bpp)
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{
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case 1:
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return *((Uint8*)Surface->pixels + y * Surface->pitch + x);
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break;
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case 2:
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return *((Uint16*)Surface->pixels + y * Surface->pitch/2 + x);
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break;
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case 3:
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// Endian-correct, but slower
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r = *((bits)+Surface->format->Rshift/8);
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g = *((bits)+Surface->format->Gshift/8);
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b = *((bits)+Surface->format->Bshift/8);
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return SDL_MapRGB(Surface->format, r, g, b);
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break;
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case 4:
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return *((Uint32*)Surface->pixels + y * Surface->pitch/4 + x);
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break;
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}
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return 0; // Best I could do for errors
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}
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DemoFont* FONT_Alloc(SDL_Surface* source_surface)
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{
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if(source_surface == NULL)
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{
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printf("ERROR: DemoFont given a NULL surface\n");
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return NULL;
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}
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DemoFont* font = (DemoFont*)malloc(sizeof(DemoFont));
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if(font == NULL)
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return NULL;
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font->buffer = (char*)malloc(sizeof(char)*1024);
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int x = 1, i = 0;
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memset(font->charPos, 0, sizeof(int)*256);
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memset(font->charWidth, 0, sizeof(Uint16)*256);
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SDL_LockSurface(source_surface);
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Uint32 pixel = SDL_MapRGB(source_surface->format, 255, 0, 255); // pink pixel
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// Get the character positions and widths
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while(x < source_surface->w)
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{
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if(_GetPixel(source_surface, x, 0) != pixel)
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{
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font->charPos[i] = x;
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font->charWidth[i] = x;
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while(x < source_surface->w && _GetPixel(source_surface, x, 0) != pixel)
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x++;
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font->charWidth[i] = x - font->charWidth[i];
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i++;
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}
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x++;
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}
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pixel = _GetPixel(source_surface, 0, source_surface->h - 1);
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Uint8 uses_alpha;
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#ifdef SDL_GPU_USE_SDL2
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SDL_BlendMode blendMode;
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SDL_GetSurfaceBlendMode(source_surface, &blendMode);
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uses_alpha = (blendMode != SDL_BLENDMODE_NONE);
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#else
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uses_alpha = ((source_surface->flags & SDL_SRCALPHA) == SDL_SRCALPHA);
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#endif
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if(!uses_alpha)
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{
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pixel = _GetPixel(source_surface, 0, source_surface->h - 1);
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SDL_UnlockSurface(source_surface);
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#ifdef SDL_GPU_USE_SDL2
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SDL_SetColorKey(source_surface, SDL_TRUE, pixel);
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#else
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SDL_SetColorKey(source_surface, SDL_SRCCOLORKEY, pixel);
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#endif
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}
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else
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SDL_UnlockSurface(source_surface);
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font->image = GPU_CopyImageFromSurface(source_surface);
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if(font->image == NULL)
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{
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FONT_Free(font);
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return NULL;
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}
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return font;
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}
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void FONT_Free(DemoFont* font)
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{
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GPU_FreeImage(font->image);
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free(font->buffer);
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free(font);
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}
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void FONT_Draw(DemoFont* font, GPU_Target* target, float x, float y, const char* formatted_text, ...)
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{
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if(font == NULL || formatted_text == NULL || font->image == NULL)
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return;
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va_list lst;
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va_start(lst, formatted_text);
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vsnprintf(font->buffer, 1024, formatted_text, lst);
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va_end(lst);
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char* text = font->buffer;
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const char* c = text;
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unsigned char num;
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GPU_Rect srcRect;
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srcRect.y = 0;
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srcRect.h = font->image->h;
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int letterSpacing = 1;
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for(; *c != '\0'; c++)
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{
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if (*c == ' ')
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{
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x += font->charWidth[0] + letterSpacing;
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continue;
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}
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unsigned char ctest = (unsigned char)(*c);
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// Skip bad characters
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if(ctest < 33 || (ctest > 126 && ctest < 161))
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continue;
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num = ctest - 33; // Get array index
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if(num > 126) // shift the extended characters down to the correct index
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num -= 34;
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srcRect.x = font->charPos[num];
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srcRect.w = font->charWidth[num];
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GPU_Blit(font->image, &srcRect, target, x, y);
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x += srcRect.w + letterSpacing;
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}
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}
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demos/common/demo-font.h
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demos/common/demo-font.h
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#ifndef _DEMO_FONT_H__
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#define _DEMO_FONT_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "SDL_gpu.h"
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typedef struct DemoFont
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{
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GPU_Image* image;
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char* buffer;
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int charPos[256];
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Uint16 charWidth[256];
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} DemoFont;
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DemoFont* FONT_Alloc(SDL_Surface* source_surface);
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void FONT_Free(DemoFont* font);
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void FONT_Draw(DemoFont* font, GPU_Target* target, float x, float y, const char* formatted_text, ...);
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#ifdef __cplusplus
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}
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#endif
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#endif
demos/data/comic14.png
demos/data/comic14.png
This is a binary file and will not be displayed.
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demos/render-target/main.c
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demos/render-target/main.c
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#include <math.h>
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#include "compat.h"
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#include "common.h"
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#include "demo-font.h"
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int main(int argc, char* argv[])
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if(image3 == NULL)
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return -1;
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SDL_Surface* font_surface = GPU_LoadSurface("data/comic14.png");
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DemoFont* font = FONT_Alloc(font_surface);
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GPU_SetRGB(font->image, 255, 0, 0);
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SDL_FreeSurface(font_surface);
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GPU_Image* mode1image = GPU_CreateImage(300, 300, 4);
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if(mode1image == NULL)
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GPU_Blit(mode2image, NULL, screen, mode2image->w/2, mode2image->h/2);
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}
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FONT_Draw(font, screen, 20, 20, "Testing");
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GPU_Flip(screen);
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frameCount++;
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printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
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FONT_Free(font);
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GPU_FreeImage(mode2image);
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GPU_FreeImage(mode1image);
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GPU_Quit();