/**
* \brief Renders the internal texture if any, and all subsurfaces that are
* drawn onto it.
* \param renderer The renderer where to draw.
* \param src_rect The subrectangle of the texture to draw.
* \param dst_rect The position where to draw on the renderer.
* \param clip_rect A portion of the renderer where to restrict the drawing.
* \param opacity The opacity of the parent surface.
* \param subsurfaces The subsurfaces drawn onto this texture. They will be
* renderered recursively.
*/
void Surface::render(
SDL_Renderer* renderer,
const Rectangle& src_rect,
const Rectangle& dst_rect,
const Rectangle& clip_rect,
uint8_t opacity,
const std::vector<SubSurfaceNodePtr>& subsurfaces
) {
//FIXME SDL_RenderSetClipRect is buggy for now, but should be fixed soon.
// It means that software and hardware surface doesn't have the exact same behavior for now.
// Uncomment the two lines using it when https://bugzilla.libsdl.org/show_bug.cgi?id=2336 will be solved.
// Accelerate the internal software surface.
if (internal_surface != nullptr) {
if (internal_texture == nullptr) {
create_texture_from_surface();
}
// If the software surface has changed, update the hardware texture.
else if (
(software_destination || !Video::is_acceleration_enabled())
&& !is_rendered) {
SDL_UpdateTexture(
internal_texture.get(),
nullptr,
internal_surface->pixels,
internal_surface->pitch
);
SDL_GetSurfaceAlphaMod(internal_surface.get(), &this->opacity);
}
}
const uint8_t current_opacity = std::min(this->opacity, opacity);
// Draw the internal color as background color.
if (internal_color != nullptr) {
uint8_t r, g, b, a;
internal_color->get_components(r, g, b, a);
SDL_SetRenderDrawColor(renderer, r, g, b, std::min((uint8_t) a, current_opacity));
//SDL_RenderSetClipRect(renderer, clip_rect.get_internal_rect());
SDL_RenderFillRect(renderer, clip_rect.get_internal_rect());
}
// Draw the internal texture.
if (internal_texture != nullptr) {
SDL_SetTextureAlphaMod(internal_texture.get(), current_opacity);
//SDL_RenderSetClipRect(renderer, clip_rect.get_internal_rect());
SDL_RenderCopy(
renderer,
internal_texture.get(),
src_rect.get_internal_rect(),
dst_rect.get_internal_rect()
);
}
// The surface is rendered. Now draw all subtextures.
for (const SubSurfaceNodePtr& subsurface: subsurfaces) {
// subsurface has to be drawn on this surface
// Calculate absolute destination subrectangle position on screen.
Rectangle subsurface_dst_rect(
dst_rect.get_xy() + subsurface->dst_rect.get_xy() - src_rect.get_xy(),
subsurface->src_rect.get_size()
);
// Set the intersection of the subsurface destination and this surface's clip as clipping rectangle.
Rectangle superimposed_clip_rect;
if (SDL_IntersectRect(subsurface_dst_rect.get_internal_rect(),
clip_rect.get_internal_rect(),
superimposed_clip_rect.get_internal_rect())) {
// If there is an intersection, render the subsurface.
subsurface->src_surface->render(
renderer,
subsurface->src_rect,
subsurface_dst_rect,
superimposed_clip_rect,
current_opacity,
subsurface->subsurfaces
);
}
}
is_rendered = true;
}
void blit_block_item_sheet()
{
GLuint block_item_64_texture = 0;
{
unsigned int color_tex, fb, depth_rb;
const int xres = 1024;
const int yres = 1024;
const float scale = 64.0f;
//RGBA8 2D texture, 24 bit depth texture, 256x256
glGenTextures(1, &color_tex);
glBindTexture(GL_TEXTURE_2D, color_tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//NULL means reserve texture memory, but texels are undefined
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xres,yres, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
//-------------------------
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
//Attach 2D texture to this FBO
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, color_tex, 0);
//-------------------------
glGenRenderbuffersEXT(1, &depth_rb);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_rb);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, xres,yres);
//-------------------------
//Attach depth buffer to FBO
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb);
//-------------------------
//Does the GPU support current FBO configuration?
GLenum status;
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch (status)
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
//printf("FBO works\n");
break;
default:
printf("blit_block_item_sheet: FBO error\n");
break;
}
//-------------------------
//and now you can render to GL_TEXTURE_2D
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//-------------------------
glViewport(0, 0, xres, yres);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0f, (float) xres, 0.0f, (float) yres, -1.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//-------------------------
//glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);
GL_ASSERT(GL_BLEND, false);
glDisable(GL_DEPTH_TEST);
glBindTexture(GL_TEXTURE_2D, t_map::block_textures_normal);
glBegin(GL_QUADS);
for (int i=0; i<16; i++)
for (int j=0; j<16; j++)
{
/*
const int T = 0;
const int B = 1;
const int N = 2;
const int S = 3;
const int W = 4;
const int E = 5;
*/
int index = 16*j+i;
// the NULL_CUBE is reserved at 255 (so that it fits in a packet)
// must skip it
if (!isValid((CubeType)index)) continue;
int s1 = get_cube_side_texture((CubeType)index, 0); //T
int s2 = get_cube_side_texture((CubeType)index, 2); //N
int s3 = get_cube_side_texture((CubeType)index, 4); //W
draw_iso_cube(i*scale, j*scale, scale, s1,s2,s3);
}
glEnd();
block_item_64_surface = create_surface_from_nothing(xres, yres);
SDL_LockSurface(block_item_64_surface);
GLenum format = get_texture_format(block_item_64_surface);
//glReadPixels(0, 0, xres, yres, GL_RGBA, GL_UNSIGNED_BYTE, (void*) block_item_64_surface->pixels);
glReadPixels(0, 0, xres, yres, format, GL_UNSIGNED_BYTE, (void*) block_item_64_surface->pixels);
SDL_UnlockSurface(block_item_64_surface);
save_surface_to_png(block_item_64_surface, SCREENSHOT_PATH "fbo_test_64.png");
//Delete resources
glDeleteTextures(1, &color_tex);
glDeleteRenderbuffersEXT(1, &depth_rb);
//Bind 0, which means render to back buffer, as a result, fb is unbound
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &fb);
//http://stackoverflow.com/questions/5102277/resizing-an-image-using-opengl
// setup another framebuffer here
// bind the 64 pixel texture
// draw to a 256x256 framebuffer
// save surface to png again
create_texture_from_surface(block_item_64_surface, &block_item_64_texture, GL_NEAREST);
//create_texture_from_surface(block_item_64_surface, &block_item_64_texture, GL_LINEAR);
GS_ASSERT_ABORT(block_item_64_texture != 0);
SDL_FreeSurface(block_item_64_surface);
}
{
unsigned int color_tex, fb, depth_rb;
const int xres = 256;
const int yres = 256;
//const float scale = 16.0;
//RGBA8 2D texture, 24 bit depth texture, 256x256
glGenTextures(1, &color_tex);
glBindTexture(GL_TEXTURE_2D, color_tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//NULL means reserve texture memory, but texels are undefined
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xres,yres, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
//-------------------------
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
//Attach 2D texture to this FBO
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, color_tex, 0);
//-------------------------
glGenRenderbuffersEXT(1, &depth_rb);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_rb);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, xres,yres);
//-------------------------
//Attach depth buffer to FBO
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb);
//-------------------------
//Does the GPU support current FBO configuration?
GLenum status;
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch (status)
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
//printf("FBO works\n");
break;
default:
printf("blit_block_item_sheet: FBO error\n");
break;
}
//-------------------------
//and now you can render to GL_TEXTURE_2D
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//-------------------------
glViewport(0, 0, xres, yres);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0f, (float) xres, 0.0f, (float) yres, -1.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//-------------------------
//glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);
GL_ASSERT(GL_BLEND, false);
glDisable(GL_DEPTH_TEST);
//glBindTexture(GL_TEXTURE_2D, t_map::block_textures_normal);
//glBegin(GL_QUADS);
//for (int i=0; i<16; i++)
//for (int j=0; j<16; j++)
//{
///*
//const int T = 0;
//const int B = 1;
//const int N = 2;
//const int S = 3;
//const int W = 4;
//const int E = 5;
//*/
//int index = 16*j+i;
//int s1 = get_cube_side_texture(index, 0); //T
//int s2 = get_cube_side_texture(index, 2); //N
//int s3 = get_cube_side_texture(index, 4); //W
//draw_iso_cube(i*scale, j*scale, scale, s1,s2,s3);
//}
//glEnd();
//glBegin(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, block_item_64_texture);
draw_bound_texture(0.0f, 0.0f, xres, yres);
//glDisable(GL_TEXTURE_2D);
block_item_16_surface = create_surface_from_nothing(xres, yres);
SDL_LockSurface(block_item_16_surface);
GLenum format = get_texture_format(block_item_16_surface);
//glReadPixels(0, 0, xres, yres, GL_RGBA, GL_UNSIGNED_BYTE, (void*) block_item_16_surface->pixels);
glReadPixels(0, 0, xres, yres, format, GL_UNSIGNED_BYTE, (void*) block_item_16_surface->pixels);
SDL_UnlockSurface(block_item_16_surface);
save_surface_to_png(block_item_16_surface, SCREENSHOT_PATH "fbo_test_16.png");
//Delete resources
glDeleteTextures(1, &color_tex);
glDeleteRenderbuffersEXT(1, &depth_rb);
//Bind 0, which means render to back buffer, as a result, fb is unbound
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &fb);
SDL_FreeSurface(block_item_16_surface);
}
glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
glBindTexture(GL_TEXTURE_2D, 0);
glViewport (0, 0, _xres, _yres);
}
/**
* \brief Renders the internal texture if any, and all subsurfaces that are
* drawn onto it.
* \param renderer The renderer where to draw.
* \param src_rect The subrectangle of the texture to draw.
* \param dst_xy The position where to draw on the renderer.
* The width and height of this rectangle are ignored.
* \param clip_rect A portion of the renderer where to restrict the drawing.
* \param opacity The opacity of the parent surface.
* \param subsurfaces The subsurfaces drawn onto this texture. They will be
* renderered recursively.
*/
void Surface::render(
SDL_Renderer* renderer,
const Rectangle& src_rect,
const Rectangle& dst_xy,
const Rectangle& clip_rect,
uint8_t opacity,
const std::vector<SubSurfaceNode*>& subsurfaces) {
const uint8_t current_opacity = std::min(internal_opacity, opacity);
// Accelerate the internal software surface.
if (internal_surface != NULL) {
if (internal_texture == NULL) {
create_texture_from_surface();
}
// If the software surface has changed, update the hardware texture.
else if (
(software_destination || !Video::is_acceleration_enabled())
&& !is_rendered) {
convert_software_surface();
SDL_UpdateTexture(
internal_texture,
NULL,
internal_surface->pixels,
internal_surface->pitch
);
SDL_GetSurfaceAlphaMod(internal_surface, &internal_opacity);
}
}
// Draw the internal color as background color.
if (internal_color != NULL) {
int r, g, b, a;
internal_color->get_components(r, g, b, a);
SDL_SetRenderDrawColor(renderer, r, g, b, std::min((uint8_t) a, current_opacity));
//SDL_RenderSetClipRect(renderer, clip_rect.get_internal_rect());
SDL_RenderFillRect(renderer, clip_rect.get_internal_rect());
}
// Draw the internal texture.
if (internal_texture != NULL) {
SDL_SetTextureAlphaMod(internal_texture, current_opacity);
//SDL_RenderSetClipRect(renderer, clip_rect.get_internal_rect());
SDL_RenderCopy(
renderer,
internal_texture,
src_rect.get_internal_rect(),
dst_xy.get_internal_rect()
);
}
// The surface is renderered. Now draw all subtextures.
std::vector<SubSurfaceNode*>::const_iterator it;
const std::vector<SubSurfaceNode*>::const_iterator end = subsurfaces.end();
for (it = subsurfaces.begin(); it != end; ++it) {
SubSurfaceNode* subsurface = *it;
// subsurface has to be drawn on this surface
// Calculate absolute destination subrectangle position on screen.
Rectangle subsurface_dst_rect(
dst_xy.get_x() + subsurface->dst_rect.get_x() - src_rect.get_x(),
dst_xy.get_y() + subsurface->dst_rect.get_y() - src_rect.get_y(),
subsurface->src_rect.get_width(),
subsurface->src_rect.get_height()
);
// Set the intersection of the subsurface destination and this surface's clip as clipping rectangle.
Rectangle superimposed_clip_rect;
if (SDL_IntersectRect(subsurface_dst_rect.get_internal_rect(),
clip_rect.get_internal_rect(),
superimposed_clip_rect.get_internal_rect())) {
// If there is an intersection, render the subsurface.
subsurface->src_surface->render(
renderer,
subsurface->src_rect,
subsurface_dst_rect,
superimposed_clip_rect,
current_opacity,
subsurface->subsurfaces
);
}
}
is_rendered = true;
}
