void update_texture(texture_ref *tex)
{
if (tex->dynamic)
return;
if (LIVEUPDATE_ISNULL(tex->container))
{
empty_texture(tex->handle);
return;
}
datacontainer::loaded_data *loaded = datacontainer::load(tex->container, true);
if (!loaded || !loaded->size)
{
empty_texture(tex->handle);
if (loaded) datacontainer::release(loaded);
return;
}
if (!loaded->size || !tex->source_tex->output)
{
KOSMOS_WARNING("Empty texture?!")
empty_texture(tex->handle);
if (loaded) datacontainer::release(loaded);
return;
}
switch (tex->source_tex->output->rtti_type_id())
{
case outki::texture_output_raw::TYPE_ID:
{
if (loaded->size != 4 * tex->source_tex->width * tex->source_tex->height)
{
KOSMOS_WARNING("Texture is " << tex->source_tex->width << "x" << tex->source_tex->height << " but bytes are " << loaded->size)
empty_texture(tex->handle);
}
else
{
glBindTexture(GL_TEXTURE_2D, tex->handle);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex->source_tex->width, tex->source_tex->height,
0, GL_RGBA, GL_UNSIGNED_BYTE, loaded->data);
KOSMOS_INFO("Updated texture [" << tex->handle << "] with " << loaded->size << " bytes");
}
break;
}
default:
{
empty_texture(tex->handle);
KOSMOS_WARNING("Unsupported texture format");
break;
}
}
datacontainer::release(loaded);
}
int main()
{
int exit = 0, i;
GLuint fbo, canvas, brush;
init();
VECTOR arm[ARM_NUMBER], arm_normal[ARM_NUMBER], center = vector(SCREEN_W / 2, SCREEN_H / 2), p, p1, p2;
for(i = 0; i < ARM_NUMBER; i++)
{
arm[i].x = cos(i * 2.0 * M_PI / ARM_NUMBER);
arm[i].y = sin(i * 2.0 * M_PI / ARM_NUMBER);
arm_normal[i] = VECTOR_NORMAL(arm[i]);
}
glGenFramebuffersEXT(1, &fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
canvas = empty_texture(SCREEN_W, SCREEN_H);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, canvas, 0);
brush = load_texture("brush.bmp", AGL_TEXTURE_MIPMAP, GL_RGB8);
glBindTexture(GL_TEXTURE_2D, brush);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
while(!exit)
{
if(key[KEY_ESC]) { exit = 1; }
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
if(mouse_b == 1)
{
glBindTexture(GL_TEXTURE_2D, brush);
glColor3ub(rand() % 128, rand() % 128, rand() % 128);
glBegin(GL_QUADS);
p = vector(center.x - mouse_x, center.y - mouse_y);
for(i = 0; i < ARM_NUMBER; i++)
{
p1 = VECTOR_SUM(USCALE_VECTOR(arm[i], p.x), USCALE_VECTOR(arm_normal[i], -p.y));
p2 = VECTOR_SUM(USCALE_VECTOR(arm[i], p.x), USCALE_VECTOR(arm_normal[i], p.y));
my_rect(vector(center.x + p1.x, center.y + p1.y), 5.0);
my_rect(vector(center.x + p2.x, center.y + p2.y), 5.0);
}
glEnd();
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, canvas);
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_QUADS);
glTexCoord2f(0.0, 1.0); glVertex2f(0.0, 0.0);
glTexCoord2f(1.0, 1.0); glVertex2f(SCREEN_W, 0.0);
glTexCoord2f(1.0, 0.0); glVertex2f(SCREEN_W, SCREEN_H);
glTexCoord2f(0.0, 0.0); glVertex2f(0.0, SCREEN_H);
glEnd();
glBindTexture(GL_TEXTURE_2D, brush);
glColor3ub(255, 0, 0);
glBegin(GL_QUADS);
my_rect(vector(mouse_x, mouse_y), 10.0);
glEnd();
allegro_gl_flip();
}
return 0;
}
