88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
#include "render_node.h"
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#include "engine.h"
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#include "memory.h"
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#include <SDL2/SDL_image.h>
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static void freeMemory(void* ptr) {
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RenderNode* node = (RenderNode*)ptr;
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SDL_DestroyTexture(node->texture);
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//free this node type's memory
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FREE(RenderNode, ptr);
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}
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//duplicate the initEngineNode() functionality, plus extra stuff
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void initRenderNode(RenderNode* node, Interpreter* interpreter, void* tb, size_t size) {
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//init
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node->freeMemory = freeMemory;
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node->functions = ALLOCATE(LiteralDictionary, 1);
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node->children = NULL;
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node->capacity = 0;
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node->count = 0;
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node->texture = NULL;
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initLiteralDictionary(node->functions);
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//run bytecode
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runInterpreter(interpreter, tb, size);
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//grab all top-level function literals
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LiteralDictionary* variablesPtr = &interpreter->scope->variables;
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for (int i = 0; i < variablesPtr->capacity; i++) {
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//skip empties and tombstones
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if (IS_NULL(variablesPtr->entries[i].key)) {
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continue;
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}
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//if this variable is a function
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_entry* entry = &variablesPtr->entries[i];
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if (IS_FUNCTION(entry->value)) {
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//save a copy
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setLiteralDictionary(node->functions, entry->key, entry->value);
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}
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}
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}
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int loadTextureRenderNode(RenderNode* node, char* fname) {
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SDL_Surface* surface = IMG_Load(fname);
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if (surface == NULL) {
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return -1;
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}
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node->texture = SDL_CreateTextureFromSurface(engine.renderer, surface);
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if (node->texture == NULL) {
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return -2;
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}
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SDL_FreeSurface(surface);
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int w, h;
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SDL_QueryTexture(node->texture, NULL, NULL, &w, &h);
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SDL_Rect r = { 0, 0, w, h };
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setRectRenderNode(node, r);
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return 0;
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}
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void freeTextureRenderNode(RenderNode* node) {
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if (node->texture != NULL) {
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SDL_DestroyTexture(node->texture);
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node->texture = NULL;
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}
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}
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void setRectRenderNode(RenderNode* node, SDL_Rect rect) {
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node->rect = rect;
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}
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void drawRenderNode(RenderNode* node, SDL_Rect dest) {
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SDL_RenderCopy(engine.renderer, node->texture, &node->rect, &dest);
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}
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