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Extend SDL2 Renderer and SDL2-video-demo (#208)

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ppeb 2025-01-18 02:42:18 -06:00 • committed by GitHub
parent a093730da2
commit 4961f2153e
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5 changed files with 79 additions and 5 deletions
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4
renderers/SDL2/README
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@ -1,7 +1,5 @@
Please note, the SDL2 renderer is not 100% feature complete. It is currently missing:
- Border rendering
- Image rendering
- Rounded rectangle corners
Note: on Mac OSX, SDL2 for some reason decides to automatically disable momentum scrolling on macbook trackpads.
@ -10,4 +8,4 @@ You can re enable it in objective C using:
```C
[[NSUserDefaults standardUserDefaults] setBool: YES
forKey: @"AppleMomentumScrollSupported"];
```
```

50
renderers/SDL2/clay_renderer_SDL2.c
View file

@ -1,8 +1,11 @@
#include "../../clay.h"
#include <SDL.h>
#include <SDL_ttf.h>
#include <SDL_image.h>
#include <stdio.h>
#define CLAY_COLOR_TO_SDL_COLOR_ARGS(color) color.r, color.g, color.b, color.a
typedef struct
{
uint32_t fontId;
@ -93,10 +96,55 @@ static void Clay_SDL2_Render(SDL_Renderer *renderer, Clay_RenderCommandArray ren
SDL_RenderSetClipRect(renderer, NULL);
break;
}
case CLAY_RENDER_COMMAND_TYPE_IMAGE: {
SDL_Surface *image = (SDL_Surface *)renderCommand->config.imageElementConfig->imageData;
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, image);
SDL_Rect destination = (SDL_Rect){
.x = boundingBox.x,
.y = boundingBox.y,
.w = boundingBox.width,
.h = boundingBox.height,
};
SDL_RenderCopy(renderer, texture, NULL, &destination);
break;
}
case CLAY_RENDER_COMMAND_TYPE_BORDER: {
Clay_BorderElementConfig *config = renderCommand->config.borderElementConfig;
if (config->left.width > 0) {
SDL_SetRenderDrawColor(renderer, CLAY_COLOR_TO_SDL_COLOR_ARGS(config->left.color));
SDL_RenderFillRectF(renderer, &(SDL_FRect){ boundingBox.x, boundingBox.y + config->cornerRadius.topLeft, config->left.width, boundingBox.height - config->cornerRadius.topLeft - config->cornerRadius.bottomLeft });
}
if (config->right.width > 0) {
SDL_SetRenderDrawColor(renderer, CLAY_COLOR_TO_SDL_COLOR_ARGS(config->right.color));
SDL_RenderFillRectF(renderer, &(SDL_FRect){ boundingBox.x + boundingBox.width - config->right.width, boundingBox.y + config->cornerRadius.topRight, config->right.width, boundingBox.height - config->cornerRadius.topRight - config->cornerRadius.bottomRight });
}
if (config->right.width > 0) {
SDL_SetRenderDrawColor(renderer, CLAY_COLOR_TO_SDL_COLOR_ARGS(config->right.color));
SDL_RenderFillRectF(renderer, &(SDL_FRect){ boundingBox.x + boundingBox.width - config->right.width, boundingBox.y + config->cornerRadius.topRight, config->right.width, boundingBox.height - config->cornerRadius.topRight - config->cornerRadius.bottomRight });
}
if (config->top.width > 0) {
SDL_SetRenderDrawColor(renderer, CLAY_COLOR_TO_SDL_COLOR_ARGS(config->right.color));
SDL_RenderFillRectF(renderer, &(SDL_FRect){ boundingBox.x + config->cornerRadius.topLeft, boundingBox.y, boundingBox.width - config->cornerRadius.topLeft - config->cornerRadius.topRight, config->top.width });
}
if (config->bottom.width > 0) {
SDL_SetRenderDrawColor(renderer, CLAY_COLOR_TO_SDL_COLOR_ARGS(config->bottom.color));
SDL_RenderFillRectF(renderer, &(SDL_FRect){ boundingBox.x + config->cornerRadius.bottomLeft, boundingBox.y + boundingBox.height - config->bottom.width, boundingBox.width - config->cornerRadius.bottomLeft - config->cornerRadius.bottomRight, config->bottom.width });
}
break;
}
default: {
fprintf(stderr, "Error: unhandled render command: %d\n", renderCommand->commandType);
exit(1);
}
}
}
}
}