void loop(GLFWwindow* window, const std::function<void(int, int, float&, void*)>& loop) {
while (!glfwWindowShouldClose(window)) {
window_context_t* context = (window_context_t*)glfwGetWindowUserPointer(window);
glViewport(0, 0, context->texture_width, context->texture_height);
ImGui_ImplGlfwGL3_NewFrame();
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, context->pixel_buffer_id);
void* pointer = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_READ_WRITE);
float scale = 0.0f;
if (pointer) {
loop(context->texture_width, context->texture_height, scale, pointer);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
}
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
draw_fullscreen_quad(window, std::vector<glm::vec4>(), scale);
ImGui::Render();
glfwSwapBuffers(window);
glfwPollEvents();
}
}
void draw_fullscreen_quad(
GLFWwindow* window,
const std::vector<glm::vec4>& image,
float scale) {
window_context_t* context = (window_context_t*)glfwGetWindowUserPointer(window);
glUseProgram(context->program_id);
glBindVertexArray(context->varray_id);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, context->pixel_buffer_id);
glUniform1f(context->scale_location, scale);
bind_fullscreen_texture(window);
glTexSubImage2D(
GL_TEXTURE_2D, 0, 0, 0,
context->texture_width,
context->texture_height,
GL_RGBA,
GL_FLOAT,
0);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
draw_fullscreen_quad(context->buffer_id);
}
void draw_texture(tex_unit* t, int vp[4])
{
glActiveTexture(GL_TEXTURE0);
t->bind();
draw_fullscreen_quad(vp, true);
t->unbind();
}
void render_sky(void)
{
static int prog = 0;
if (!prog) {
prog = compile_shader(sky_vert_src, sky_frag_src);
}
glUseProgram(prog);
draw_fullscreen_quad();
}
void render_blit(mat4 proj, mat4 view, int w, int h)
{
static int prog = 0;
// Render fullscreen quad with post-process filter
if (!prog) {
prog = compile_shader(blit_vert_src, blit_frag_src);
}
glUseProgram(prog);
glBindTexture(GL_TEXTURE_2D, tex_forward);
#ifdef HAVE_SRGB_FRAMEBUFFER
draw_fullscreen_quad();
#else
glDisable(GL_FRAMEBUFFER_SRGB);
draw_fullscreen_quad();
glEnable(GL_FRAMEBUFFER_SRGB);
#endif
}
//---------------------------------------------------------------
// Purpose:
//---------------------------------------------------------------
void CPostProcessor::blur( bool hori, UINT sourceTex, UINT destTex, int lod )
{
int vpW = g_RenderInterf->GetRenderer()->GetScreenWidth() / IntPow(2, lod);
int vpH = g_RenderInterf->GetRenderer()->GetScreenHeight() / IntPow(2, lod);
m_shaderBlur->Enable();
m_shaderBlur->SetLodLevel(lod);
m_shaderBlur->SetBlurDirection(hori);
glViewport(0,0,vpW,vpH);
glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, destTex, lod );
glBindTexture(GL_TEXTURE_2D, sourceTex);
draw_fullscreen_quad();
}
// display the final image on the screen
void GPUVolRTV0::render_buffer_to_screen(DrawEnv *pEnv)
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
if(toggle_visuals)
glBindTexture(GL_TEXTURE_2D,final_image);
else
glBindTexture(GL_TEXTURE_2D,backface_buffer);
// reshape_ortho(WINDOW_SIZE,WINDOW_SIZE);
reshape_ortho(pEnv->getPixelWidth(), pEnv->getPixelHeight());
draw_fullscreen_quad();
glDisable(GL_TEXTURE_2D);
}
void draw_rec_texture(tex_unit* t, int vp[4], shader_object* rectex_shader)
{
glActiveTexture(GL_TEXTURE0);
t->bind();
float mag[2];
mag[0] = 1.0 * t->get_width() / vp[2];
mag[1] = 1.0 * t->get_height() / vp[3];
rectex_shader->use();
glUniform2f(rectex_shader->getUniformLocation("vpxy"), vp[0], vp[1]);
glUniform2f(rectex_shader->getUniformLocation("p"), mag[0], mag[1]);
draw_fullscreen_quad(vp, false);
glUseProgram(0);
t->unbind();
}
void render_point_lamp(struct lamp *lamp, mat4 clip_from_view, mat4 view_from_world, mat4 lamp_transform)
{
static int prog = 0;
static int uni_viewport;
static int uni_view_from_clip;
static int uni_lamp_position;
static int uni_lamp_color;
static int uni_lamp_distance;
static int uni_use_sphere;
mat4 view_from_clip;
vec2 viewport;
vec3 lamp_position;
vec3 lamp_color;
if (!prog) {
prog = compile_shader(quad_vert_src, point_frag_src);
uni_viewport = glGetUniformLocation(prog, "viewport");
uni_view_from_clip = glGetUniformLocation(prog, "view_from_clip");
uni_lamp_position = glGetUniformLocation(prog, "lamp_position");
uni_lamp_color = glGetUniformLocation(prog, "lamp_color");
uni_lamp_distance = glGetUniformLocation(prog, "lamp_distance");
uni_use_sphere = glGetUniformLocation(prog, "use_sphere");
}
mat_invert(view_from_clip, clip_from_view);
viewport[0] = fbo_w;
viewport[1] = fbo_h;
mat_vec_mul(lamp_position, view_from_world, lamp_transform + 12);
vec_scale(lamp_color, lamp->color, lamp->energy);
glUseProgram(prog);
glUniform2fv(uni_viewport, 1, viewport);
glUniformMatrix4fv(uni_view_from_clip, 1, 0, view_from_clip);
glUniform3fv(uni_lamp_position, 1, lamp_position);
glUniform3fv(uni_lamp_color, 1, lamp_color);
glUniform1f(uni_lamp_distance, lamp->distance);
glUniform1i(uni_use_sphere, lamp->use_sphere);
draw_fullscreen_quad();
}
void cgtk::render_buffer_to_screen()
{
//glEnable(GL_BLEND);
////glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
//glMatrixMode(GL_MODELVIEW);
//glPushMatrix();
//glLoadIdentity();
//glEnable(GL_TEXTURE_RECTANGLE_ARB);
//if(toggle_visuals)
// glBindTexture(GL_TEXTURE_RECTANGLE_ARB,final_image);
//else
// glBindTexture(GL_TEXTURE_RECTANGLE_ARB,backface_buffer);
//reshape_ortho(WINDOW_SIZE,WINDOW_SIZE);
//draw_fullscreen_quad();
//glDisable(GL_TEXTURE_RECTANGLE_ARB);
//glMatrixMode(GL_MODELVIEW);
//glPopMatrix();
glEnable(GL_BLEND);
//glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
//glMatrixMode(GL_MODELVIEW);
//glPushMatrix();
glLoadIdentity();
glEnable(GL_TEXTURE_RECTANGLE_ARB);
if(toggle_visuals)
glBindTexture(GL_TEXTURE_RECTANGLE_ARB,final_image);
else
glBindTexture(GL_TEXTURE_RECTANGLE_ARB,backface_buffer);
reshape_ortho(WINDOW_SIZE_W,WINDOW_SIZE_H);
draw_fullscreen_quad();
glDisable(GL_TEXTURE_RECTANGLE_ARB);
//glMatrixMode(GL_PROJECTION);
//glLoadIdentity();
//glPopMatrix();
}
//---------------------------------------------------------------
// Purpose:
//---------------------------------------------------------------
void CPostProcessor::tonemap( UINT sceneTex, UINT sceneDepthTex, UINT bloomTex, UINT lumTex, UINT destTex )
{
CRenderer *r = g_RenderInterf->GetRenderer();
m_shaderTonemap->Enable();
m_shaderTonemap->SetZBounds( r->GetNearClippingDist(), r->GetFarClippingDist() );
m_shaderTonemap->SetBloomLodLevels(
render_bloom_lod_start.GetInt(), render_bloom_lod_levels.GetInt());
r->BindTexture( sceneTex, 0 );
r->BindTexture( sceneDepthTex, 1 );
r->BindTexture( bloomTex, 2 );
r->BindTexture( lumTex, 3, 0 );
if( destTex <= 0 )
glBindFramebuffer(GL_FRAMEBUFFER, 0);
else
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, destTex, 0);
draw_fullscreen_quad();
}
void render_sun_lamp(struct lamp *lamp, mat4 clip_from_view, mat4 view_from_world, mat4 lamp_transform)
{
static int prog = 0;
static int uni_viewport;
static int uni_lamp_direction;
static int uni_lamp_color;
static const vec3 lamp_direction_init = { 0, 0, 1 };
vec2 viewport;
vec3 lamp_direction_world;
vec3 lamp_direction_view;
vec3 lamp_direction;
vec3 lamp_color;
if (!prog) {
prog = compile_shader(quad_vert_src, sun_frag_src);
uni_viewport = glGetUniformLocation(prog, "viewport");
uni_lamp_direction = glGetUniformLocation(prog, "lamp_direction");
uni_lamp_color = glGetUniformLocation(prog, "lamp_color");
}
viewport[0] = fbo_w;
viewport[1] = fbo_h;
mat_vec_mul_n(lamp_direction_world, lamp_transform, lamp_direction_init);
mat_vec_mul_n(lamp_direction_view, view_from_world, lamp_direction_world);
vec_normalize(lamp_direction, lamp_direction_view);
vec_scale(lamp_color, lamp->color, lamp->energy);
glUseProgram(prog);
glUniform2fv(uni_viewport, 1, viewport);
glUniform3fv(uni_lamp_direction, 1, lamp_direction);
glUniform3fv(uni_lamp_color, 1, lamp_color);
draw_fullscreen_quad();
}
void render_spot_lamp(struct lamp *lamp, mat4 clip_from_view, mat4 view_from_world, mat4 lamp_transform)
{
static int prog = 0;
static int uni_viewport;
static int uni_view_from_clip;
static int uni_lamp_position;
static int uni_lamp_direction;
static int uni_lamp_color;
static int uni_lamp_distance;
static int uni_spot_size;
static int uni_spot_blend;
static int uni_use_sphere;
static const vec3 lamp_direction_init = { 0, 0, 1 };
mat4 view_from_clip;
vec2 viewport;
vec3 lamp_position;
vec3 lamp_direction_world;
vec3 lamp_direction_view;
vec3 lamp_direction;
vec3 lamp_color;
float spot_size;
float spot_blend;
if (!prog) {
prog = compile_shader(quad_vert_src, spot_frag_src);
uni_viewport = glGetUniformLocation(prog, "viewport");
uni_view_from_clip = glGetUniformLocation(prog, "view_from_clip");
uni_lamp_position = glGetUniformLocation(prog, "lamp_position");
uni_lamp_direction = glGetUniformLocation(prog, "lamp_direction");
uni_lamp_color = glGetUniformLocation(prog, "lamp_color");
uni_lamp_distance = glGetUniformLocation(prog, "lamp_distance");
uni_spot_size = glGetUniformLocation(prog, "spot_size");
uni_spot_blend = glGetUniformLocation(prog, "spot_blend");
uni_use_sphere = glGetUniformLocation(prog, "use_sphere");
}
mat_invert(view_from_clip, clip_from_view);
viewport[0] = fbo_w;
viewport[1] = fbo_h;
mat_vec_mul(lamp_position, view_from_world, lamp_transform + 12);
mat_vec_mul_n(lamp_direction_world, lamp_transform, lamp_direction_init);
mat_vec_mul_n(lamp_direction_view, view_from_world, lamp_direction_world);
vec_normalize(lamp_direction, lamp_direction_view);
vec_scale(lamp_color, lamp->color, lamp->energy);
spot_size = cos(M_PI * lamp->spot_angle / 360.0);
spot_blend = (1.0 - spot_size) * lamp->spot_blend;
glUseProgram(prog);
glUniform2fv(uni_viewport, 1, viewport);
glUniformMatrix4fv(uni_view_from_clip, 1, 0, view_from_clip);
glUniform3fv(uni_lamp_position, 1, lamp_position);
glUniform3fv(uni_lamp_direction, 1, lamp_direction);
glUniform3fv(uni_lamp_color, 1, lamp_color);
glUniform1f(uni_lamp_distance, lamp->distance);
glUniform1f(uni_spot_size, spot_size);
glUniform1f(uni_spot_blend, spot_blend);
glUniform1i(uni_use_sphere, lamp->use_sphere);
draw_fullscreen_quad();
}
