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[Renderers/SDL2] Create initial SDL2 renderer (#115)

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Co-authored-by: Junior Rantila <junior.rantila@gmail.com>
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Nic Barker 2024-12-28 19:15:22 +13:00 • committed by GitHub
parent bec56e68a4
commit ac473d6fe7
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GPG key ID: B5690EEEBB952194
9 changed files with 574 additions and 26 deletions
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13
renderers/SDL2/README Normal file
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@ -0,0 +1,13 @@
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.
You can re enable it in objective C using:
```C
[[NSUserDefaults standardUserDefaults] setBool: YES
forKey: @"AppleMomentumScrollSupported"];
```

101
renderers/SDL2/clay_renderer_SDL2.c Normal file
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@ -0,0 +1,101 @@
#include "../../clay.h"
#include <SDL.h>
#include <SDL_ttf.h>
typedef struct
{
uint32_t fontId;
TTF_Font *font;
} SDL2_Font;
static SDL2_Font SDL2_fonts[1];
static Clay_Dimensions SDL2_MeasureText(Clay_String *text, Clay_TextElementConfig *config)
{
TTF_Font *font = SDL2_fonts[config->fontId].font;
char *chars = (char *)calloc(text->length + 1, 1);
memcpy(chars, text->chars, text->length);
int width = 0;
int height = 0;
if (TTF_SizeUTF8(font, chars, &width, &height) < 0) {
fprintf(stderr, "Error: could not measure text: %s\n", TTF_GetError());
exit(1);
}
free(chars);
return (Clay_Dimensions) {
.width = (float)width,
.height = (float)height,
};
}
SDL_Rect currentClippingRectangle;
static void Clay_SDL2_Render(SDL_Renderer *renderer, Clay_RenderCommandArray renderCommands)
{
for (uint32_t i = 0; i < renderCommands.length; i++)
{
Clay_RenderCommand *renderCommand = Clay_RenderCommandArray_Get(&renderCommands, i);
Clay_BoundingBox boundingBox = renderCommand->boundingBox;
switch (renderCommand->commandType)
{
case CLAY_RENDER_COMMAND_TYPE_RECTANGLE: {
Clay_RectangleElementConfig *config = renderCommand->config.rectangleElementConfig;
Clay_Color color = config->color;
SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, color.a);
SDL_FRect rect = (SDL_FRect) {
.x = boundingBox.x,
.y = boundingBox.y,
.w = boundingBox.width,
.h = boundingBox.height,
};
SDL_RenderFillRectF(renderer, &rect);
break;
}
case CLAY_RENDER_COMMAND_TYPE_TEXT: {
Clay_TextElementConfig *config = renderCommand->config.textElementConfig;
Clay_String text = renderCommand->text;
char *cloned = (char *)calloc(text.length + 1, 1);
memcpy(cloned, text.chars, text.length);
TTF_Font* font = SDL2_fonts[config->fontId].font;
SDL_Surface *surface = TTF_RenderUTF8_Blended(font, cloned, (SDL_Color) {
.r = (Uint8)config->textColor.r,
.g = (Uint8)config->textColor.g,
.b = (Uint8)config->textColor.b,
.a = (Uint8)config->textColor.a,
});
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, surface);
SDL_Rect destination = (SDL_Rect){
.x = boundingBox.x,
.y = boundingBox.y,
.w = boundingBox.width,
.h = boundingBox.height,
};
SDL_RenderCopy(renderer, texture, NULL, &destination);
SDL_DestroyTexture(texture);
SDL_FreeSurface(surface);
free(cloned);
break;
}
case CLAY_RENDER_COMMAND_TYPE_SCISSOR_START: {
currentClippingRectangle = (SDL_Rect) {
.x = boundingBox.x,
.y = boundingBox.y,
.w = boundingBox.width,
.h = boundingBox.height,
};
SDL_RenderSetClipRect(renderer, &currentClippingRectangle);
break;
}
case CLAY_RENDER_COMMAND_TYPE_SCISSOR_END: {
SDL_RenderSetClipRect(renderer, NULL);
break;
}
default: {
fprintf(stderr, "Error: unhandled render command: %d\n", renderCommand->commandType);
exit(1);
}
}
}
}

6
renderers/raylib/clay_renderer_raylib.c
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@ -4,9 +4,6 @@
#include "string.h"
#include "stdio.h"
#include "stdlib.h"
#ifdef CLAY_OVERFLOW_TRAP
#include "signal.h"
#endif
#define CLAY_RECTANGLE_TO_RAYLIB_RECTANGLE(rectangle) (Rectangle) { .x = rectangle.x, .y = rectangle.y, .width = rectangle.width, .height = rectangle.height }
#define CLAY_COLOR_TO_RAYLIB_COLOR(color) (Color) { .r = (unsigned char)roundf(color.r), .g = (unsigned char)roundf(color.g), .b = (unsigned char)roundf(color.b), .a = (unsigned char)roundf(color.a) }
@ -229,9 +226,6 @@ void Clay_Raylib_Render(Clay_RenderCommandArray renderCommands)
}
default: {
printf("Error: unhandled render command.");
#ifdef CLAY_OVERFLOW_TRAP
raise(SIGTRAP);
#endif
exit(1);
}
}