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130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
#define SOKOL_IMPL
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#if defined(WIN32) || defined(_WIN32)
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#define SOKOL_D3D11
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#endif
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#include "sokol_app.h"
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#include "sokol_gfx.h"
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#include "sokol_glue.h"
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#include "quad-sapp.glsl.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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static struct {
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sg_pass_action pass_action;
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sg_pipeline pip;
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sg_bindings bind;
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} state;
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void init(void) {
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sg_setup(&(sg_desc){
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.context = sapp_sgcontext()
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});
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// load the image
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state.bind.fs_images[SLOT_tex] = sg_alloc_image();
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int png_width, png_height, num_channels;
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const int desired_channels = 4;
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stbi_uc* pixels = stbi_load(
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"assets/merchant.png",
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&png_width, &png_height,
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&num_channels, 0);
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if (pixels) {
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sg_init_image(state.bind.fs_images[0], &(sg_image_desc){
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.width = png_width,
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.height = png_height,
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.pixel_format = SG_PIXELFORMAT_RGBA8,
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.min_filter = SG_FILTER_LINEAR,
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.mag_filter = SG_FILTER_LINEAR,
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.data.subimage[0][0] = {
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.ptr = pixels,
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.size = (size_t)(png_width * png_height * 4),
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}
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});
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stbi_image_free(pixels);
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}
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/* a vertex buffer */
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float vertices[] = {
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// positions texcoords
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-0.5f, 0.5f, 0.0f, 0.0f,
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0.5f, 0.5f, 1.0f, 0.0f,
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0.5f, -0.5f, 1.0f, 1.0f,
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-0.5f, -0.5f, 0.0f, 1.0f,
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};
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state.bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
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.data = SG_RANGE(vertices),
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.label = "quad-vertices"
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});
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/* an index buffer with 2 triangles */
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uint16_t indices[] = { 0, 1, 2, 0, 2, 3 };
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state.bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
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.type = SG_BUFFERTYPE_INDEXBUFFER,
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.data = SG_RANGE(indices),
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.label = "quad-indices"
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});
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/* a shader (use separate shader sources here */
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sg_shader shd = sg_make_shader(quad_shader_desc(sg_query_backend()));
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/* a pipeline state object */
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state.pip = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = shd,
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.index_type = SG_INDEXTYPE_UINT16,
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.layout = {
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.attrs = {
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[ATTR_vs_position].format = SG_VERTEXFORMAT_FLOAT2,
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[ATTR_vs_texcoord0].format = SG_VERTEXFORMAT_FLOAT2,
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}
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},
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.label = "quad-pipeline"
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});
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/* default pass action */
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state.pass_action = (sg_pass_action) {
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.colors[0] = { .action=SG_ACTION_CLEAR, .value={0.0f, 0.0f, 0.0f, 1.0f } }
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};
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}
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void frame(void) {
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sg_begin_default_pass(&state.pass_action, sapp_width(), sapp_height());
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sg_apply_pipeline(state.pip);
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sg_apply_bindings(&state.bind);
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sg_draw(0, 6, 1);
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sg_end_pass();
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sg_commit();
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}
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void cleanup(void) {
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sg_shutdown();
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}
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void event(const sapp_event *e) {
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if(e->type == SAPP_EVENTTYPE_KEY_DOWN) {
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if(e->key_code == SAPP_KEYCODE_ESCAPE) {
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sapp_quit();
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}
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}
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}
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sapp_desc sokol_main(int argc, char* argv[]) {
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(void)argc; (void)argv;
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return (sapp_desc){
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.init_cb = init,
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.frame_cb = frame,
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.cleanup_cb = cleanup,
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.event_cb = event,
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.width = 800,
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.height = 600,
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.gl_force_gles2 = true,
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.window_title = "RPGPT",
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.win32_console_attach = true,
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.icon.sokol_default = true,
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};
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}
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