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5 Commits

Author SHA1 Message Date
Harrison Lambeth
7f7e2871f7
Merge b97bf246c8 into bc2548e3ec 2025-02-13 01:25:36 +03:00
tomat
bc2548e3ec
[Renderers/SDL3] Add image rendering and scissor support to SDL3 renderer (#246)
Some checks are pending
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CMake on multiple platforms / build (Release, gcc, g++, ubuntu-latest) (push) Waiting to run
2025-02-13 10:02:06 +13:00
Julio Ernesto Rodríguez Cabañas
eeb4520f48
[Renderers/SDL3] Use text engine to render text on the SDL3 renderer (#256) 2025-02-13 09:19:36 +13:00
Harrison Lambeth
b97bf246c8 Fix some things that broke after rebasing 2025-01-29 19:21:31 -07:00
Harrison Lambeth
3f39223eb4 Clay_GetElementIdsAtPoint 2025-01-29 19:07:45 -07:00
6 changed files with 180 additions and 50 deletions

63
clay.h
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@ -764,6 +764,12 @@ typedef struct {
void *userData;
} Clay_ErrorHandler;
typedef struct
{
int32_t length;
const Clay_ElementId *results;
} Clay_PointQueryResult;
// Function Forward Declarations ---------------------------------
// Public API functions ------------------------------------------
@ -855,6 +861,7 @@ void Clay_SetMaxMeasureTextCacheWordCount(int32_t maxMeasureTextCacheWordCount);
// Resets Clay's internal text measurement cache, useful if memory to represent strings is being re-used.
// Similar behaviour can be achieved on an individual text element level by using Clay_TextElementConfig.hashStringContents
void Clay_ResetMeasureTextCache(void);
Clay_PointQueryResult Clay_GetElementIdsAtPoint(Clay_Vector2 point);
// Internal API functions required by macros ----------------------
@ -1217,6 +1224,8 @@ struct Clay_Context {
Clay__boolArray treeNodeVisited;
Clay__charArray dynamicStringData;
Clay__DebugElementDataArray debugElementData;
// Point querying
Clay__ElementIdArray pointQueryIds;
};
Clay_Context* Clay__Context_Allocate_Arena(Clay_Arena *arena) {
@ -1987,6 +1996,7 @@ void Clay__InitializePersistentMemory(Clay_Context* context) {
context->measureTextHashMap = Clay__int32_tArray_Allocate_Arena(maxElementCount, arena);
context->measuredWords = Clay__MeasuredWordArray_Allocate_Arena(maxMeasureTextCacheWordCount, arena);
context->pointerOverIds = Clay__ElementIdArray_Allocate_Arena(maxElementCount, arena);
context->pointQueryIds = Clay__ElementIdArray_Allocate_Arena(maxElementCount, arena);
context->debugElementData = Clay__DebugElementDataArray_Allocate_Arena(maxElementCount, arena);
context->arenaResetOffset = arena->nextAllocation;
}
@ -3676,6 +3686,59 @@ void Clay_SetPointerState(Clay_Vector2 position, bool isPointerDown) {
}
}
CLAY_WASM_EXPORT("Clay_GetElementIdsAtPoint")
Clay_PointQueryResult Clay_GetElementIdsAtPoint(Clay_Vector2 position) {
Clay_Context* context = Clay_GetCurrentContext();
if (context->booleanWarnings.maxElementsExceeded) {
return CLAY__INIT(Clay_PointQueryResult) { 0, NULL };
}
context->pointQueryIds.length = 0;
Clay__int32_tArray dfsBuffer = context->layoutElementChildrenBuffer;
for (int32_t rootIndex = context->layoutElementTreeRoots.length - 1; rootIndex >= 0; --rootIndex) {
dfsBuffer.length = 0;
Clay__LayoutElementTreeRoot *root = Clay__LayoutElementTreeRootArray_Get(&context->layoutElementTreeRoots, rootIndex);
Clay__int32_tArray_Add(&dfsBuffer, (int32_t)root->layoutElementIndex);
context->treeNodeVisited.internalArray[0] = false;
bool found = false;
while (dfsBuffer.length > 0) {
if (context->treeNodeVisited.internalArray[dfsBuffer.length - 1]) {
dfsBuffer.length--;
continue;
}
context->treeNodeVisited.internalArray[dfsBuffer.length - 1] = true;
Clay_LayoutElement *currentElement = Clay_LayoutElementArray_Get(&context->layoutElements, Clay__int32_tArray_GetValue(&dfsBuffer, (int)dfsBuffer.length - 1));
Clay_LayoutElementHashMapItem *mapItem = Clay__GetHashMapItem(currentElement->id); // TODO think of a way around this, maybe the fact that it's essentially a binary tree limits the cost, but the worst case is not great
Clay_BoundingBox elementBox = mapItem->boundingBox;
elementBox.x -= root->pointerOffset.x;
elementBox.y -= root->pointerOffset.y;
if (mapItem) {
if ((Clay__PointIsInsideRect(position, elementBox))) {
Clay__ElementIdArray_Add(&context->pointQueryIds, mapItem->elementId);
found = true;
}
if (Clay__ElementHasConfig(currentElement, CLAY__ELEMENT_CONFIG_TYPE_TEXT)) {
dfsBuffer.length--;
continue;
}
for (int32_t i = currentElement->childrenOrTextContent.children.length - 1; i >= 0; --i) {
Clay__int32_tArray_Add(&dfsBuffer, currentElement->childrenOrTextContent.children.elements[i]);
context->treeNodeVisited.internalArray[dfsBuffer.length - 1] = false; // TODO needs to be ranged checked
}
} else {
dfsBuffer.length--;
}
}
Clay_LayoutElement *rootElement = Clay_LayoutElementArray_Get(&context->layoutElements, root->layoutElementIndex);
if (found && Clay__ElementHasConfig(rootElement, CLAY__ELEMENT_CONFIG_TYPE_FLOATING_CONTAINER) &&
Clay__FindElementConfigWithType(rootElement, CLAY__ELEMENT_CONFIG_TYPE_FLOATING_CONTAINER).floatingElementConfig->pointerCaptureMode == CLAY_POINTER_CAPTURE_MODE_CAPTURE) {
break;
}
}
return CLAY__INIT(Clay_PointQueryResult) { context->pointQueryIds.length, context->pointQueryIds.internalArray };
}
CLAY_WASM_EXPORT("Clay_Initialize")
Clay_Context* Clay_Initialize(Clay_Arena arena, Clay_Dimensions layoutDimensions, Clay_ErrorHandler errorHandler) {
Clay_Context *context = Clay__Context_Allocate_Arena(&arena);

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@ -14,7 +14,7 @@ set(FETCHCONTENT_QUIET FALSE)
FetchContent_Declare(
SDL
GIT_REPOSITORY https://github.com/libsdl-org/SDL.git
GIT_TAG preview-3.1.6
GIT_TAG release-3.2.4
GIT_SHALLOW TRUE
GIT_PROGRESS TRUE
)
@ -34,11 +34,24 @@ message(STATUS "Using SDL_ttf via FetchContent")
FetchContent_MakeAvailable(SDL_ttf)
set_property(DIRECTORY "${sdl_ttf_SOURCE_DIR}" PROPERTY EXCLUDE_FROM_ALL TRUE)
# Download SDL_image
FetchContent_Declare(
SDL_image
GIT_REPOSITORY "https://github.com/libsdl-org/SDL_image.git"
GIT_TAG release-3.2.0 # Slightly risky to use main branch, but it's the only one available
GIT_SHALLOW TRUE
GIT_PROGRESS TRUE
)
message(STATUS "Using SDL_image via FetchContent")
FetchContent_MakeAvailable(SDL_image)
set_property(DIRECTORY "${SDL_image_SOURCE_DIR}" PROPERTY EXCLUDE_FROM_ALL TRUE)
# Example executable
add_executable(${PROJECT_NAME} main.c)
target_link_libraries(${PROJECT_NAME} PRIVATE
SDL3::SDL3
SDL3_ttf::SDL3_ttf
SDL3_image::SDL3_image
)
add_custom_command(

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@ -19,13 +19,16 @@ static const Clay_Color COLOR_LIGHT = (Clay_Color) {224, 215, 210, 255};
typedef struct app_state {
SDL_Window *window;
SDL_Renderer *renderer;
Clay_SDL3RendererData rendererData;
ClayVideoDemo_Data demoData;
} AppState;
SDL_Surface *sample_image;
static inline Clay_Dimensions SDL_MeasureText(Clay_StringSlice text, Clay_TextElementConfig *config, void *userData)
{
TTF_Font *font = gFonts[config->fontId];
TTF_Font **fonts = userData;
TTF_Font *font = fonts[config->fontId];
int width, height;
if (!TTF_GetStringSize(font, text.chars, text.length, &width, &height)) {
@ -54,19 +57,33 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
}
*appstate = state;
if (!SDL_CreateWindowAndRenderer("Clay Demo", 640, 480, 0, &state->window, &state->renderer)) {
if (!SDL_CreateWindowAndRenderer("Clay Demo", 640, 480, 0, &state->window, &state->rendererData.renderer)) {
SDL_LogError(SDL_LOG_CATEGORY_ERROR, "Failed to create window and renderer: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
SDL_SetWindowResizable(state->window, true);
state->rendererData.textEngine = TTF_CreateRendererTextEngine(state->rendererData.renderer);
if (!state->rendererData.textEngine) {
SDL_LogError(SDL_LOG_CATEGORY_ERROR, "Failed to create text engine from renderer: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
state->rendererData.fonts = SDL_calloc(1, sizeof(TTF_Font *));
if (!state->rendererData.fonts) {
SDL_LogError(SDL_LOG_CATEGORY_ERROR, "Failed to allocate memory for the font array: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
TTF_Font *font = TTF_OpenFont("resources/Roboto-Regular.ttf", 24);
if (!font) {
SDL_LogError(SDL_LOG_CATEGORY_ERROR, "Failed to load font: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
gFonts[FONT_ID] = font;
state->rendererData.fonts[FONT_ID] = font;
sample_image = IMG_Load("resources/sample.png");
/* Initialize Clay */
uint64_t totalMemorySize = Clay_MinMemorySize();
@ -78,7 +95,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
int width, height;
SDL_GetWindowSize(state->window, &width, &height);
Clay_Initialize(clayMemory, (Clay_Dimensions) { (float) width, (float) height }, (Clay_ErrorHandler) { HandleClayErrors });
Clay_SetMeasureTextFunction(SDL_MeasureText, 0);
Clay_SetMeasureTextFunction(SDL_MeasureText, state->rendererData.fonts);
state->demoData = ClayVideoDemo_Initialize();
@ -99,10 +116,14 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
break;
case SDL_EVENT_MOUSE_MOTION:
Clay_SetPointerState((Clay_Vector2) { event->motion.x, event->motion.y },
event->motion.state & SDL_BUTTON_LEFT);
event->motion.state & SDL_BUTTON_LMASK);
break;
case SDL_EVENT_MOUSE_BUTTON_DOWN:
Clay_SetPointerState((Clay_Vector2) { event->button.x, event->button.y },
event->button.button == SDL_BUTTON_LEFT);
break;
case SDL_EVENT_MOUSE_WHEEL:
Clay_UpdateScrollContainers(true, (Clay_Vector2) { event->motion.xrel, event->motion.yrel }, 0.01f);
Clay_UpdateScrollContainers(true, (Clay_Vector2) { event->wheel.x, event->wheel.y }, 0.01f);
break;
default:
break;
@ -117,12 +138,12 @@ SDL_AppResult SDL_AppIterate(void *appstate)
Clay_RenderCommandArray render_commands = ClayVideoDemo_CreateLayout(&state->demoData);
SDL_SetRenderDrawColor(state->renderer, 0, 0, 0, 255);
SDL_RenderClear(state->renderer);
SDL_SetRenderDrawColor(state->rendererData.renderer, 0, 0, 0, 255);
SDL_RenderClear(state->rendererData.renderer);
SDL_RenderClayCommands(state->renderer, &render_commands);
SDL_Clay_RenderClayCommands(&state->rendererData, &render_commands);
SDL_RenderPresent(state->renderer);
SDL_RenderPresent(state->rendererData.renderer);
return SDL_APP_CONTINUE;
}
@ -138,12 +159,23 @@ void SDL_AppQuit(void *appstate, SDL_AppResult result)
AppState *state = appstate;
if (state) {
if (state->renderer)
SDL_DestroyRenderer(state->renderer);
if (state->rendererData.renderer)
SDL_DestroyRenderer(state->rendererData.renderer);
if (state->window)
SDL_DestroyWindow(state->window);
if (state->rendererData.fonts) {
for(size_t i = 0; i < sizeof(state->rendererData.fonts) / sizeof(*state->rendererData.fonts); i++) {
TTF_CloseFont(state->rendererData.fonts[i]);
}
SDL_free(state->rendererData.fonts);
}
if (state->rendererData.textEngine)
TTF_DestroyRendererTextEngine(state->rendererData.textEngine);
SDL_free(state);
}
TTF_Quit();

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@ -1,4 +0,0 @@
Please note, the SDL3 renderer is not 100% feature complete. It is currently missing:
- Images
- Scroll / Scissor handling

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@ -2,16 +2,20 @@
#include <SDL3/SDL_main.h>
#include <SDL3/SDL.h>
#include <SDL3_ttf/SDL_ttf.h>
#include <SDL3_image/SDL_image.h>
typedef struct {
SDL_Renderer *renderer;
TTF_TextEngine *textEngine;
TTF_Font **fonts;
} Clay_SDL3RendererData;
/* This needs to be global because the "MeasureText" callback doesn't have a
* user data parameter */
static TTF_Font *gFonts[1];
/* Global for convenience. Even in 4K this is enough for smooth curves (low radius or rect size coupled with
* no AA or low resolution might make it appear as jagged curves) */
static int NUM_CIRCLE_SEGMENTS = 16;
//all rendering is performed by a single SDL call, avoiding multiple RenderRect + plumbing choice for circles.
static void SDL_RenderFillRoundedRect(SDL_Renderer *renderer, const SDL_FRect rect, const float cornerRadius, const Clay_Color _color) {
static void SDL_Clay_RenderFillRoundedRect(Clay_SDL3RendererData *rendererData, const SDL_FRect rect, const float cornerRadius, const Clay_Color _color) {
const SDL_FColor color = { _color.r/255, _color.g/255, _color.b/255, _color.a/255 };
int indexCount = 0, vertexCount = 0;
@ -109,11 +113,11 @@ static void SDL_RenderFillRoundedRect(SDL_Renderer *renderer, const SDL_FRect re
indices[indexCount++] = vertexCount - 1; //LT
// Render everything
SDL_RenderGeometry(renderer, NULL, vertices, vertexCount, indices, indexCount);
SDL_RenderGeometry(rendererData->renderer, NULL, vertices, vertexCount, indices, indexCount);
}
static void SDL_RenderArc(SDL_Renderer *renderer, const SDL_FPoint center, const float radius, const float startAngle, const float endAngle, const float thickness, const Clay_Color color) {
SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, color.a);
static void SDL_Clay_RenderArc(Clay_SDL3RendererData *rendererData, const SDL_FPoint center, const float radius, const float startAngle, const float endAngle, const float thickness, const Clay_Color color) {
SDL_SetRenderDrawColor(rendererData->renderer, color.r, color.g, color.b, color.a);
const float radStart = startAngle * (SDL_PI_F / 180.0f);
const float radEnd = endAngle * (SDL_PI_F / 180.0f);
@ -133,38 +137,36 @@ static void SDL_RenderArc(SDL_Renderer *renderer, const SDL_FPoint center, const
SDL_roundf(center.x + SDL_cosf(angle) * clampedRadius),
SDL_roundf(center.y + SDL_sinf(angle) * clampedRadius) };
}
SDL_RenderLines(renderer, points, numCircleSegments + 1);
SDL_RenderLines(rendererData->renderer, points, numCircleSegments + 1);
}
}
static void SDL_RenderClayCommands(SDL_Renderer *renderer, Clay_RenderCommandArray *rcommands)
SDL_Rect currentClippingRectangle;
static void SDL_Clay_RenderClayCommands(Clay_SDL3RendererData *rendererData, Clay_RenderCommandArray *rcommands)
{
for (size_t i = 0; i < rcommands->length; i++) {
Clay_RenderCommand *rcmd = Clay_RenderCommandArray_Get(rcommands, i);
const Clay_BoundingBox bounding_box = rcmd->boundingBox;
const SDL_FRect rect = { bounding_box.x, bounding_box.y, bounding_box.width, bounding_box.height };
const SDL_FRect rect = { (int)bounding_box.x, (int)bounding_box.y, (int)bounding_box.width, (int)bounding_box.height };
switch (rcmd->commandType) {
case CLAY_RENDER_COMMAND_TYPE_RECTANGLE: {
Clay_RectangleRenderData *config = &rcmd->renderData.rectangle;
SDL_SetRenderDrawColor(renderer, config->backgroundColor.r, config->backgroundColor.g, config->backgroundColor.b, config->backgroundColor.a);
SDL_SetRenderDrawColor(rendererData->renderer, config->backgroundColor.r, config->backgroundColor.g, config->backgroundColor.b, config->backgroundColor.a);
if (config->cornerRadius.topLeft > 0) {
SDL_RenderFillRoundedRect(renderer, rect, config->cornerRadius.topLeft, config->backgroundColor);
SDL_Clay_RenderFillRoundedRect(rendererData, rect, config->cornerRadius.topLeft, config->backgroundColor);
} else {
SDL_RenderFillRect(renderer, &rect);
SDL_RenderFillRect(rendererData->renderer, &rect);
}
} break;
case CLAY_RENDER_COMMAND_TYPE_TEXT: {
Clay_TextRenderData *config = &rcmd->renderData.text;
const SDL_Color color = { config->textColor.r, config->textColor.g, config->textColor.b, config->textColor.a };
TTF_Font *font = gFonts[config->fontId];
SDL_Surface *surface = TTF_RenderText_Blended(font, config->stringContents.chars, config->stringContents.length, color);
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, surface);
SDL_RenderTexture(renderer, texture, NULL, &rect);
SDL_DestroySurface(surface);
SDL_DestroyTexture(texture);
TTF_Font *font = rendererData->fonts[config->fontId];
TTF_Text *text = TTF_CreateText(rendererData->textEngine, font, config->stringContents.chars, config->stringContents.length);
TTF_SetTextColor(text, config->textColor.r, config->textColor.g, config->textColor.b, config->textColor.a);
TTF_DrawRendererText(text, rect.x, rect.y);
TTF_DestroyText(text);
} break;
case CLAY_RENDER_COMMAND_TYPE_BORDER: {
Clay_BorderRenderData *config = &rcmd->renderData.border;
@ -177,61 +179,85 @@ static void SDL_RenderClayCommands(SDL_Renderer *renderer, Clay_RenderCommandArr
.bottomRight = SDL_min(config->cornerRadius.bottomRight, minRadius)
};
//edges
SDL_SetRenderDrawColor(renderer, config->color.r, config->color.g, config->color.b, config->color.a);
SDL_SetRenderDrawColor(rendererData->renderer, config->color.r, config->color.g, config->color.b, config->color.a);
if (config->width.left > 0) {
const float starting_y = rect.y + clampedRadii.topLeft;
const float length = rect.h - clampedRadii.topLeft - clampedRadii.bottomLeft;
SDL_FRect line = { rect.x, starting_y, config->width.left, length };
SDL_RenderFillRect(renderer, &line);
SDL_RenderFillRect(rendererData->renderer, &line);
}
if (config->width.right > 0) {
const float starting_x = rect.x + rect.w - (float)config->width.right;
const float starting_y = rect.y + clampedRadii.topRight;
const float length = rect.h - clampedRadii.topRight - clampedRadii.bottomRight;
SDL_FRect line = { starting_x, starting_y, config->width.right, length };
SDL_RenderFillRect(renderer, &line);
SDL_RenderFillRect(rendererData->renderer, &line);
}
if (config->width.top > 0) {
const float starting_x = rect.x + clampedRadii.topLeft;
const float length = rect.w - clampedRadii.topLeft - clampedRadii.topRight;
SDL_FRect line = { starting_x, rect.y, length, config->width.top };
SDL_RenderFillRect(renderer, &line);
SDL_RenderFillRect(rendererData->renderer, &line);
}
if (config->width.bottom > 0) {
const float starting_x = rect.x + clampedRadii.bottomLeft;
const float starting_y = rect.y + rect.h - (float)config->width.bottom;
const float length = rect.w - clampedRadii.bottomLeft - clampedRadii.bottomRight;
SDL_FRect line = { starting_x, starting_y, length, config->width.bottom };
SDL_SetRenderDrawColor(renderer, config->color.r, config->color.g, config->color.b, config->color.a);
SDL_RenderFillRect(renderer, &line);
SDL_SetRenderDrawColor(rendererData->renderer, config->color.r, config->color.g, config->color.b, config->color.a);
SDL_RenderFillRect(rendererData->renderer, &line);
}
//corners
if (config->cornerRadius.topLeft > 0) {
const float centerX = rect.x + clampedRadii.topLeft -1;
const float centerY = rect.y + clampedRadii.topLeft;
SDL_RenderArc(renderer, (SDL_FPoint){centerX, centerY}, clampedRadii.topLeft,
SDL_Clay_RenderArc(rendererData, (SDL_FPoint){centerX, centerY}, clampedRadii.topLeft,
180.0f, 270.0f, config->width.top, config->color);
}
if (config->cornerRadius.topRight > 0) {
const float centerX = rect.x + rect.w - clampedRadii.topRight -1;
const float centerY = rect.y + clampedRadii.topRight;
SDL_RenderArc(renderer, (SDL_FPoint){centerX, centerY}, clampedRadii.topRight,
SDL_Clay_RenderArc(rendererData, (SDL_FPoint){centerX, centerY}, clampedRadii.topRight,
270.0f, 360.0f, config->width.top, config->color);
}
if (config->cornerRadius.bottomLeft > 0) {
const float centerX = rect.x + clampedRadii.bottomLeft -1;
const float centerY = rect.y + rect.h - clampedRadii.bottomLeft -1;
SDL_RenderArc(renderer, (SDL_FPoint){centerX, centerY}, clampedRadii.bottomLeft,
SDL_Clay_RenderArc(rendererData, (SDL_FPoint){centerX, centerY}, clampedRadii.bottomLeft,
90.0f, 180.0f, config->width.bottom, config->color);
}
if (config->cornerRadius.bottomRight > 0) {
const float centerX = rect.x + rect.w - clampedRadii.bottomRight -1; //TODO: why need to -1 in all calculations???
const float centerY = rect.y + rect.h - clampedRadii.bottomRight -1;
SDL_RenderArc(renderer, (SDL_FPoint){centerX, centerY}, clampedRadii.bottomRight,
SDL_Clay_RenderArc(rendererData, (SDL_FPoint){centerX, centerY}, clampedRadii.bottomRight,
0.0f, 90.0f, config->width.bottom, config->color);
}
} break;
case CLAY_RENDER_COMMAND_TYPE_SCISSOR_START: {
Clay_BoundingBox boundingBox = rcmd->boundingBox;
currentClippingRectangle = (SDL_Rect) {
.x = boundingBox.x,
.y = boundingBox.y,
.w = boundingBox.width,
.h = boundingBox.height,
};
SDL_SetRenderClipRect(rendererData->renderer, &currentClippingRectangle);
break;
}
case CLAY_RENDER_COMMAND_TYPE_SCISSOR_END: {
SDL_SetRenderClipRect(rendererData->renderer, NULL);
break;
}
case CLAY_RENDER_COMMAND_TYPE_IMAGE: {
SDL_Surface *image = (SDL_Surface *)rcmd->renderData.image.imageData;
SDL_Texture *texture = SDL_CreateTextureFromSurface(rendererData->renderer, image);
const SDL_FRect dest = { rect.x, rect.y, rect.w, rect.h };
SDL_RenderTexture(rendererData->renderer, texture, NULL, &dest);
SDL_DestroyTexture(texture);
break;
}
default:
SDL_Log("Unknown render command type: %d", rcmd->commandType);
}