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130 lines
3.3 KiB
C

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