131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
#include <kinc/graphics4/graphics.h>
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#include <kinc/graphics4/indexbuffer.h>
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#include <kinc/graphics4/pipeline.h>
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#include <kinc/graphics4/rendertarget.h>
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#include <kinc/graphics4/shader.h>
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#include <kinc/graphics4/vertexbuffer.h>
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#include <kinc/io/filereader.h>
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#include <kinc/system.h>
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#include "stb_image_write.h"
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#include <assert.h>
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#include <stdlib.h>
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static kinc_g4_shader_t vertex_shader;
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static kinc_g4_shader_t fragment_shader;
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static kinc_g4_pipeline_t pipeline;
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static kinc_g4_vertex_buffer_t vertices;
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static kinc_g4_index_buffer_t indices;
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static kinc_g4_render_target_t render_target;
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#define HEAP_SIZE 1024 * 1024
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static uint8_t *heap = NULL;
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static size_t heap_top = 0;
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static void *allocate(size_t size) {
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size_t old_top = heap_top;
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heap_top += size;
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assert(heap_top <= HEAP_SIZE);
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return &heap[old_top];
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}
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static void update(void *data) {
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kinc_g4_begin(0);
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kinc_g4_render_target_t *render_targets = {&render_target};
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kinc_g4_set_render_targets(&render_targets, 1);
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kinc_g4_clear(KINC_G4_CLEAR_COLOR, 0xFF000000, 0.0f, 0);
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kinc_g4_set_pipeline(&pipeline);
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kinc_g4_set_vertex_buffer(&vertices);
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kinc_g4_set_index_buffer(&indices);
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kinc_g4_draw_indexed_vertices();
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kinc_g4_end(0);
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kinc_g4_swap_buffers();
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uint8_t *pixels = (uint8_t *)malloc(2048 * 2048 * 4);
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kinc_g4_render_target_get_pixels(&render_target, pixels);
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if (kinc_g4_render_targets_inverted_y()) {
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uint8_t *inverted_pixels = (uint8_t *)malloc(2048 * 2048 * 4);
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for (int y = 0; y < 2048; ++y) {
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for (int x = 0; x < 2048; ++x) {
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for (int c = 0; c < 4; ++c) {
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inverted_pixels[y * 2048 * 4 + x * 4 + c] = pixels[(2047 - y) * 2048 * 4 + x * 4 + c];
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}
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}
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}
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pixels = inverted_pixels;
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}
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stbi_write_png("test.png", 2048, 2048, 4, pixels, 2048 * 4);
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exit(0);
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}
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static void load_shader(const char *filename, kinc_g4_shader_t *shader, kinc_g4_shader_type_t shader_type) {
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kinc_file_reader_t file;
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kinc_file_reader_open(&file, filename, KINC_FILE_TYPE_ASSET);
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size_t data_size = kinc_file_reader_size(&file);
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uint8_t *data = allocate(data_size);
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kinc_file_reader_read(&file, data, data_size);
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kinc_file_reader_close(&file);
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kinc_g4_shader_init(shader, data, data_size, shader_type);
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}
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int kickstart(int argc, char **argv) {
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kinc_init("Shader", 1024, 768, NULL, NULL);
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kinc_set_update_callback(update, NULL);
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heap = (uint8_t *)malloc(HEAP_SIZE);
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assert(heap != NULL);
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load_shader("shader.vert", &vertex_shader, KINC_G4_SHADER_TYPE_VERTEX);
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load_shader("shader.frag", &fragment_shader, KINC_G4_SHADER_TYPE_FRAGMENT);
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kinc_g4_vertex_structure_t structure;
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kinc_g4_vertex_structure_init(&structure);
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kinc_g4_vertex_structure_add(&structure, "pos", KINC_G4_VERTEX_DATA_F32_3X);
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kinc_g4_pipeline_init(&pipeline);
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pipeline.vertex_shader = &vertex_shader;
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pipeline.fragment_shader = &fragment_shader;
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pipeline.input_layout[0] = &structure;
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pipeline.input_layout[1] = NULL;
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kinc_g4_pipeline_compile(&pipeline);
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kinc_g4_vertex_buffer_init(&vertices, 3, &structure, KINC_G4_USAGE_STATIC, 0);
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{
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float *v = kinc_g4_vertex_buffer_lock_all(&vertices);
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int i = 0;
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v[i++] = -1;
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v[i++] = -1;
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v[i++] = 0.5;
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v[i++] = 1;
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v[i++] = -1;
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v[i++] = 0.5;
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v[i++] = -1;
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v[i++] = 1;
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v[i++] = 0.5;
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kinc_g4_vertex_buffer_unlock_all(&vertices);
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}
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kinc_g4_index_buffer_init(&indices, 3, KINC_G4_INDEX_BUFFER_FORMAT_16BIT, KINC_G4_USAGE_STATIC);
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{
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uint16_t *i = (uint16_t *)kinc_g4_index_buffer_lock_all(&indices);
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i[0] = 0;
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i[1] = 1;
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i[2] = 2;
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kinc_g4_index_buffer_unlock_all(&indices);
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}
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kinc_g4_render_target_init(&render_target, 2048, 2048, KINC_G4_RENDER_TARGET_FORMAT_32BIT, 16, 0);
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kinc_start();
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return 0;
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}
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