86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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#include <sokol/sokol_app.h>
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#include <sokol/sokol_gfx.h>
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#include <sokol/sokol_log.h>
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#include <sokol/sokol_glue.h>
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#include <math.h>
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#include <shaders/shader.glsl.h>
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static struct {
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sg_pipeline pip;
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sg_bindings bind;
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sg_pass_action pass_action;
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vs_params_t vs_params;
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int index;
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} state;
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static void init(void) {
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sg_setup(&(sg_desc){
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.environment = sglue_environment(),
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.logger.func = slog_func,
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});
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state.vs_params.rotation = 0.0f;
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state.index = 0;
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float vertices[] = {
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0.0f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f,
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0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 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 = "triangle-vertices"
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});
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sg_shader shd = sg_make_shader(triangle_shader_desc(sg_query_backend()));
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state.pip = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = shd,
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.layout = {
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.attrs = {
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[ATTR_vs_position].format = SG_VERTEXFORMAT_FLOAT3,
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[ATTR_vs_color0].format = SG_VERTEXFORMAT_FLOAT4
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}
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},
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.label = "triangle-pipeline",
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.cull_mode = SG_CULLMODE_BACK,
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.face_winding = SG_FACEWINDING_CCW,
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.sample_count = 1,
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});
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state.pass_action = (sg_pass_action) {
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.colors[0] = { .load_action=SG_LOADACTION_CLEAR, .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_pass(&(sg_pass){ .action = state.pass_action, .swapchain = sglue_swapchain() });
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sg_apply_pipeline(state.pip);
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sg_apply_bindings(&state.bind);
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state.vs_params.rotation = sin(++state.index * 0.05);
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sg_apply_uniforms(SG_SHADERSTAGE_VS, 0, &SG_RANGE(state.vs_params));
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sg_draw(0, 3, 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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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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.width = 640,
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.height = 480,
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.window_title = "Gear",
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.icon.sokol_default = true,
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.logger.func = slog_func,
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};
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}
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