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path: root/src/example/04_bloom/04_bloom.c
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#include "../example.h"
#include "../../extend/mesh.h"

static int cube[] = {
	0, 1, 2, 0, 2, 3,
	1, 5, 2, 2, 5, 6,
	4, 6, 5, 4, 7, 6,
	0, 3, 7, 0, 7, 4,
	0, 4, 1, 1, 4, 5,
	2, 6, 3, 3, 6, 7
};

static Vert verts[] = {
	{0, {1, 1, 1}, {1, 1, 1}, zerovec4, {1, 1}, 0xffff0000},
	{1, {-1, 1, 1}, {-1, 1, 1}, zerovec4, {0, 1},0xff00ff00},
	{2, {-1, -1, 1}, {-1, -1, 1}, zerovec4, {0, 0}, 0xff0000ff},
	{3, {1, -1, 1}, {1, -1, 1}, zerovec4, {1, 0}, 0xffff00ff},
	{4, {1, 1, -1}, {1, 1, -1}, zerovec4, {1, 0} , 0xffaa28aa},
	{5, {-1, 1, -1}, {-1, 1, -1}, zerovec4, {0, 0},0xffFFC58E},
	{6, {-1, -1, -1}, {-1, -1, -1}, zerovec4, {0, 1}, 0xffA100FF},
	{7, {1, -1, -1}, {1, -1, -1}, zerovec4, {1, 1} , 0xffFAFF00},
};

extern Program _04_bloom_preprocess;
extern Program _04_bloom_postprocess;

static Vec3 light = { -1, -1, -1 };

static Texture* cyborg_albedo;
static Mesh* cyborg_mesh;

static FrameBuffer* fbo;
static float* depth_buffer;
static byte* stencil_buffer;

static Texture* albedo_tex;
static Texture* bright_tex;

void onloadbloom(void* data) {
	ssr_matrixmode(MATRIX_PROJECTION);
	ssr_loadidentity();
	ssr_perspective(90, ssr_getaspect(), 0.1, 10);
	//ssr_ortho(-5, 5, -4, 4, 0.1, 10);

	ssr_setblendfunc(BLEND_SRC_ALPHA, BLEND_ONE_MINUS_SRC_ALPHA);

	albedo_tex = texture_create(600, 480);
	bright_tex = texture_create(600, 480);

	depth_buffer = ssrM_newvector(float, 600 * 480);
	stencil_buffer = ssrM_newvector(byte, 600 * 480);

	fbo = fbo_create();
	fbo_attachrendertexture(fbo, 0, albedo_tex);
	fbo_attachrendertexture(fbo, 1, bright_tex);
	fbo_attachdepthbuffer(fbo, depth_buffer);
	fbo_attachstencilbuffer(fbo, stencil_buffer);
}

void oneventbloom(void* data) {
}

static float _t = 0;
static Quat q;

void onupdatebloom(void*data) {
	uint dt = *(uint*)data;
	_t += dt / 1000.f;

	ssr_matrixmode(MATRIX_VIEW);
	ssr_loadidentity();
	float distance = 2;
	Vec3 p = { distance * sin(_t), 5, distance * cos(_t) }, target = { 0, 0, 0 };
	ssr_lookat(&p, &target, &vec3up);

	ssr_matrixmode(MATRIX_MODEL);
	ssr_loadidentity();
}

static void renderquad() {
	/*È«ÆÁÌØÐ§*/
	static Vert verts[] = {
		{0, {1, 1, 0}, zerovec3, zerovec3, {1, 1}, 0},
		{1, {-1, 1, 0}, zerovec3, zerovec3, {0, 1},0},
		{2, {-1, -1, 0}, zerovec3, zerovec3, {0, 0}, 0},
		{3, {1, -1, 0}, zerovec3, zerovec3, {1, 0}, 0},
	};
	static int quad[] = {
			0, 1, 2, 0, 2, 3,
	};
	ssr_useprogram(&_04_bloom_postprocess);
	ssr_bindvertices(verts, 4, quad, 2);
	ssr_setuniformtex(0, albedo_tex);
	ssr_setuniformtex(1, bright_tex);
	ssr_draw(PRIMITIVE_TRIANGLE);
}

void ondrawbloom(void*data) {
	ssr_enable(ENABLE_BACKFACECULL | ENABLE_DEPTHTEST | ENABLE_BLEND | ENABLE_WRITEDEPTH);

	/*render cube*/
	ssr_bindframebuffer(fbo);
	ssr_clearcolor(0xff202020);
	ssr_cleardepth();
	ssr_clearstencil(0);
	ssr_bindvertices(verts, 8, cube, 12);
	ssr_useprogram(&_04_bloom_preprocess);
	ssr_bindvertices(verts, 8, cube, 12);
	ssr_draw(PRIMITIVE_TRIANGLE);

	ssr_disable(ENABLE_BLEND | ENABLE_DEPTHTEST | ENABLE_WRITEDEPTH | ENABLE_BACKFACECULL);
	ssr_unbindframebuffer();
	ssr_clearcolor(0xff202020);
	ssr_cleardepth();
	ssr_clearstencil(0);

	renderquad();
}