graphics::texture render_fbo(const rect& area, const std::vector<entity_ptr> objects)
{
const controls::control_backup_scope ctrl_backup;
const int tex_width = graphics::texture::allows_npot() ? area.w() : graphics::texture::next_power_of_2(area.w());
const int tex_height = graphics::texture::allows_npot() ? area.h() : graphics::texture::next_power_of_2(area.h());
GLint video_framebuffer_id = 0;
glGetIntegerv(EXT_MACRO(GL_FRAMEBUFFER_BINDING), &video_framebuffer_id);
GLuint texture_id = 0;
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_width, tex_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
GLuint framebuffer_id = 0;
EXT_CALL(glGenFramebuffers)(1, &framebuffer_id);
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), framebuffer_id);
// attach the texture to FBO color attachment point
EXT_CALL(glFramebufferTexture2D)(EXT_MACRO(GL_FRAMEBUFFER), EXT_MACRO(GL_COLOR_ATTACHMENT0),
GL_TEXTURE_2D, texture_id, 0);
// check FBO status
GLenum status = EXT_CALL(glCheckFramebufferStatus)(EXT_MACRO(GL_FRAMEBUFFER));
ASSERT_NE(status, EXT_MACRO(GL_FRAMEBUFFER_UNSUPPORTED));
ASSERT_EQ(status, EXT_MACRO(GL_FRAMEBUFFER_COMPLETE));
glViewport(0, 0, area.w(), area.h());
level_ptr lvl(new level("empty.cfg"));
foreach(const entity_ptr& e, objects) {
lvl->add_character(e);
lvl->add_draw_character(e);
}
void set_render_to_screen()
{
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), video_framebuffer_id);
glViewport(0, 0, preferences::actual_screen_width(), preferences::actual_screen_height());
}
void set_render_to_texture()
{
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), framebuffer_id);
glViewport(0, 0, width(), height());
}
void init(int buffer_width, int buffer_height)
{
frame_buffer_texture_width = buffer_width;
frame_buffer_texture_height = buffer_height;
#if defined(TARGET_OS_HARMATTAN) || defined(TARGET_PANDORA) || defined(TARGET_TEGRA) || defined(TARGET_BLACKBERRY)
if (glGenFramebuffersOES != NULL &&
glBindFramebufferOES != NULL &&
glFramebufferTexture2DOES != NULL &&
glCheckFramebufferStatusOES != NULL)
{
supported = true;
}
else
{
fprintf(stderr, "FRAME BUFFER OBJECT NOT SUPPORTED\n");
supported = false;
return;
}
#elif !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
if(!GLEW_EXT_framebuffer_object)
{
fprintf(stderr, "FRAME BUFFER OBJECT NOT SUPPORTED\n");
supported = false;
return;
}
#endif
fprintf(stderr, "FRAME BUFFER OBJECT IS SUPPORTED\n");
#ifndef TARGET_TEGRA
glGetIntegerv(EXT_MACRO(GL_FRAMEBUFFER_BINDING), &video_framebuffer_id);
#endif
ASSERT_EQ(glGetError(), GL_NO_ERROR);
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width(), height(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBindTexture(GL_TEXTURE_2D, 0);
// create a framebuffer object
EXT_CALL(glGenFramebuffers)(1, &framebuffer_id);
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), framebuffer_id);
// attach the texture to FBO color attachment point
EXT_CALL(glFramebufferTexture2D)(EXT_MACRO(GL_FRAMEBUFFER), EXT_MACRO(GL_COLOR_ATTACHMENT0),
GL_TEXTURE_2D, texture_id, 0);
// check FBO status
GLenum status = EXT_CALL(glCheckFramebufferStatus)(EXT_MACRO(GL_FRAMEBUFFER));
ASSERT_EQ(status, EXT_MACRO(GL_FRAMEBUFFER_COMPLETE));
// switch back to window-system-provided framebuffer
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), video_framebuffer_id);
ASSERT_EQ(glGetError(), GL_NO_ERROR);
}
render_scope::render_scope()
{
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), framebuffer_id);
glViewport(0, 0, width(), height());
}
void init(int buffer_width, int buffer_height)
{
// Clear any old errors.
glGetError();
frame_buffer_texture_width = buffer_width;
frame_buffer_texture_height = buffer_height;
#if defined(__ANDROID__)
{
supported = false;
LOG("FRAME BUFFER OBJECT NOT SUPPORTED");
return;
}
#endif
#if defined(TARGET_OS_HARMATTAN) || defined(TARGET_PANDORA) || defined(TARGET_TEGRA) || defined(TARGET_BLACKBERRY) || defined(__ANDROID__)
if (glGenFramebuffersOES != NULL &&
glBindFramebufferOES != NULL &&
glFramebufferTexture2DOES != NULL &&
glCheckFramebufferStatusOES != NULL)
{
supported = true;
}
else
{
fprintf(stderr, "FRAME BUFFER OBJECT NOT SUPPORTED\n");
supported = false;
return;
}
#elif !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
if(!GLEW_EXT_framebuffer_object)
{
fprintf(stderr, "FRAME BUFFER OBJECT NOT SUPPORTED\n");
supported = false;
return;
}
#endif
fprintf(stderr, "FRAME BUFFER OBJECT IS SUPPORTED\n");
#ifndef TARGET_TEGRA
glGetIntegerv(EXT_MACRO(GL_FRAMEBUFFER_BINDING), &video_framebuffer_id);
#endif
// Grab the error code first, because of the side effect in glGetError() of
// clearing the error code and the double call in the ASSERT_EQ() macro we lose
// the actual error code.
GLenum err = glGetError();
ASSERT_EQ(err, GL_NO_ERROR);
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width(), height(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBindTexture(GL_TEXTURE_2D, 0);
// create a framebuffer object
EXT_CALL(glGenFramebuffers)(1, &framebuffer_id);
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), framebuffer_id);
// attach the texture to FBO color attachment point
EXT_CALL(glFramebufferTexture2D)(EXT_MACRO(GL_FRAMEBUFFER), EXT_MACRO(GL_COLOR_ATTACHMENT0),
GL_TEXTURE_2D, texture_id, 0);
// check FBO status
GLenum status = EXT_CALL(glCheckFramebufferStatus)(EXT_MACRO(GL_FRAMEBUFFER));
if(status == EXT_MACRO(GL_FRAMEBUFFER_UNSUPPORTED)) {
std::cerr << "FRAME BUFFER OBJECT NOT SUPPORTED\n";
supported = false;
err = glGetError();
} else {
ASSERT_EQ(status, EXT_MACRO(GL_FRAMEBUFFER_COMPLETE));
}
// switch back to window-system-provided framebuffer
EXT_CALL(glBindFramebuffer)(EXT_MACRO(GL_FRAMEBUFFER), video_framebuffer_id);
err = glGetError();
ASSERT_EQ(err, GL_NO_ERROR);
}