Created
June 26, 2023 20:18
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example of the issue I'm having with displaying textures
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emcc -I..\lib\sokol -I..\lib\stb ..\src\exp\simple_wasm_texture.c -DSOKOL_NO_ENTRY -sALLOW_MEMORY_GROWTH -o simple_wasm_texture.html |
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// going to start from scratch with this sucker. | |
// if we need to figure anything out we can do that in the | |
// experiment section and then pull over stuff we want | |
#define SOKOL_IMPL | |
#define SOKOL_GLES2 | |
#include <stdint.h> | |
#include "sokol_gfx.h" | |
#include "sokol_app.h" | |
#include "sokol_fetch.h" | |
#include "sokol_glue.h" | |
#include "sokol_log.h" | |
#include "util/sokol_gl.h" | |
#define STB_IMAGE_IMPLEMENTATION | |
#include "stb_image.h" | |
#define SIZE 1024 * 1024 | |
static struct { | |
sg_pass_action pass_action; | |
sg_image img; | |
uint8_t file_buffer[SIZE]; | |
} state; | |
void frame(void); | |
static void load_file(const sapp_html5_fetch_response* response) { | |
int png_width, png_height, num_channels; | |
const int desired_channels = 4; | |
printf("load_png...\n"); | |
stbi_uc* pixels = stbi_load_from_memory( | |
response->data.ptr, | |
response->data.size, | |
&png_width, &png_height, | |
&num_channels, desired_channels); | |
if (pixels) { | |
printf("seems like the load worked\n"); | |
state.img = sg_make_image(&(sg_image_desc){ | |
.width = png_width, | |
.height = png_height, | |
.pixel_format = SG_PIXELFORMAT_RGBA8, | |
.min_filter = SG_FILTER_NEAREST, | |
.mag_filter = SG_FILTER_NEAREST, | |
.data.subimage[0][0] = { | |
.ptr = pixels, | |
.size = (size_t)(png_width * png_height * 4), | |
} | |
}); | |
sg_resource_state result = sg_query_image_state(state.img); | |
if (result == SG_RESOURCESTATE_INVALID) { | |
// buffer poll is exhasued | |
printf("state.img buffer pool is exahsted\n"); | |
} else if (result == SG_RESOURCESTATE_FAILED) { | |
// creating the resource has failed | |
printf("state.img creating the resource has failed\n"); | |
} else if (result == SG_RESOURCESTATE_VALID) { | |
printf("state.img SUCCE$$\n"); | |
// SUCCE$$ | |
} | |
stbi_image_free(pixels); | |
} else { | |
printf("OK, PROBLEM, it didn't work... now what?\n"); | |
} | |
} | |
static void fetch_callback(const sapp_html5_fetch_response* response) { | |
printf("Got the fetch callback\n"); | |
if (response->succeeded) { | |
printf("Success\n"); | |
load_file(response); | |
} | |
else if (SAPP_HTML5_FETCH_ERROR_BUFFER_TOO_SMALL == response->error_code) { | |
printf("Loadstate File too damn big\n"); | |
} | |
else { | |
printf("Loadstate Failed\n"); | |
} | |
} | |
void init(void) { | |
printf("In init()...)\n"); | |
sg_setup(&(sg_desc){ | |
.context = sapp_sgcontext(), | |
.logger.func = slog_func, | |
}); | |
sgl_setup(&(sgl_desc_t){ | |
.logger.func = slog_func, | |
}); | |
sfetch_setup(&(sfetch_desc_t){ | |
.logger.func = slog_func | |
}); | |
// 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 sapp_event_files_dropped(const sapp_event *event) { | |
printf("Got an html dropped file\n"); | |
const int num_dropped_files = sapp_get_num_dropped_files(); | |
printf("Got some dropped files: %d\n", num_dropped_files); | |
uint32_t size = sapp_html5_get_dropped_file_size(0); | |
float file_size = (float)(size) / (1024.0f * 1024.0f); | |
printf("Dropped file size: %f MB\n", file_size); | |
printf("Is size good? = %s\n", size < SAPP_RANGE(state.file_buffer).size ? "YES" : "NO"); | |
sapp_html5_fetch_dropped_file(&(sapp_html5_fetch_request){ | |
.dropped_file_index = 0, | |
.callback = fetch_callback, | |
.buffer = SAPP_RANGE(state.file_buffer) | |
}); | |
} | |
void draw_sprite(sg_image img) { | |
sg_image_desc desc = sg_query_image_desc(img); | |
sgl_enable_texture(); | |
sgl_texture(img); | |
float sx = 0.0f; | |
float sy = 0.0f; | |
float ex = desc.width; | |
float ey = desc.height; | |
sgl_begin_quads(); | |
sgl_c3f(1.0f, 1.0f, 1.0f); | |
sgl_v3f_t2f( sx, sy, -1.0f, 0.0f, 0.0f); | |
sgl_v3f_t2f( ex, sy, -1.0f, 1.0f, 0.0f); | |
sgl_v3f_t2f( ex, ey, -1.0f, 1.0f, 1.0f); | |
sgl_v3f_t2f( sx, ey, -1.0f, 0.0f, 1.0f); | |
sgl_end(); | |
} | |
void event(const sapp_event *event) { | |
switch (event->type) { | |
case SAPP_EVENTTYPE_KEY_DOWN: | |
break; | |
case SAPP_EVENTTYPE_KEY_UP: | |
break; | |
case SAPP_EVENTTYPE_MOUSE_SCROLL: | |
break; | |
case SAPP_EVENTTYPE_MOUSE_DOWN: | |
break; | |
case SAPP_EVENTTYPE_MOUSE_UP: | |
break; | |
case SAPP_EVENTTYPE_MOUSE_MOVE: | |
break; | |
case SAPP_EVENTTYPE_FILES_DROPPED: | |
sapp_event_files_dropped(event); | |
break; | |
default: break; | |
} | |
} | |
void frame(void) { | |
sgl_defaults(); | |
sgl_matrix_mode_projection(); | |
sgl_load_identity(); | |
sgl_ortho(0.0f, sapp_widthf(), sapp_heightf(), 0.0f, 0.1f, 100.0f); | |
sgl_matrix_mode_modelview(); | |
sgl_load_identity(); | |
draw_sprite(state.img); | |
sg_begin_default_pass(&state.pass_action, sapp_width(), sapp_height()); | |
sgl_draw(); | |
sg_end_pass(); | |
sg_commit(); | |
} | |
void cleanup(void) { | |
sgl_shutdown(); | |
sg_shutdown(); | |
} | |
int main(int argc, char **argv) { | |
sapp_desc desc ={ | |
.init_cb = init, | |
.frame_cb = frame, | |
.cleanup_cb = cleanup, | |
.event_cb = event, | |
.high_dpi = true, | |
.window_title = "IDK if we even need this", | |
.icon.sokol_default = true, | |
.enable_dragndrop = true, | |
.logger.func = slog_func, | |
}; | |
sapp_run(&desc); | |
return 0; | |
} |
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These files do not display when dragged onto the webpage. They do work in Windows