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added support for renderering the external framebuffers

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This commit is contained in:
bunnei 2014-04-07 00:52:34 -04:00
parent 506e6049d3
commit 8cf851f68a
2 changed files with 147 additions and 20 deletions
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159
src/video_core/src/renderer_opengl/renderer_opengl.cpp
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@ -22,9 +22,31 @@
* http://code.google.com/p/gekko-gc-emu/
*/
#include "mem_map.h"
#include "video_core.h"
#include "renderer_opengl/renderer_opengl.h"
/**
* Helper function to flip framebuffer from left-to-right to top-to-bottom
* @param addr Address of framebuffer in RAM
* @param out Pointer to output buffer with flipped framebuffer
* @todo Early on hack... I'd like to find a more efficient way of doing this /bunnei
*/
inline void _flip_framebuffer(u32 addr, u8* out) {
u8* in = Memory::GetPointer(addr);
for (int y = 0; y < VideoCore::kScreenTopHeight; y++) {
for (int x = 0; x < VideoCore::kScreenTopWidth; x++) {
int in_coord = (VideoCore::kScreenTopHeight * 3 * x) + (VideoCore::kScreenTopHeight * 3)
- (3 * y + 3);
int out_coord = (VideoCore::kScreenTopWidth * y * 3) + (x * 3);
out[out_coord + 0] = in[in_coord + 0];
out[out_coord + 1] = in[in_coord + 1];
out[out_coord + 2] = in[in_coord + 2];
}
}
}
/// RendererOpenGL constructor
RendererOpenGL::RendererOpenGL() {
memset(fbo_, 0, sizeof(fbo_));
@ -33,27 +55,28 @@ RendererOpenGL::RendererOpenGL() {
resolution_width_ = max(VideoCore::kScreenTopWidth, VideoCore::kScreenBottomWidth);
resolution_height_ = VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight;
xfb_texture_top_ = 0;
xfb_texture_bottom_ = 0;
xfb_top_ = 0;
xfb_bottom_ = 0;
}
/// RendererOpenGL destructor
RendererOpenGL::~RendererOpenGL() {
}
/// Swap buffers (render frame)
void RendererOpenGL::SwapBuffers() {
glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
ResetRenderState();
// EFB->XFB copy
// TODO(bunnei): This is a hack and does not belong here. The copy should be triggered by some
// register write We're also treating both framebuffers as a single one in OpenGL.
Rect framebuffer_size(0, 0, VideoCore::kScreenTopWidth,
VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight);
CopyToXFB(framebuffer_size, framebuffer_size);
Rect framebuffer_size(0, 0, resolution_width_, resolution_height_);
RenderXFB(framebuffer_size, framebuffer_size);
// XFB->Window copy
RenderFramebuffer();
@ -69,20 +92,34 @@ void RendererOpenGL::SwapBuffers() {
}
/**
* Blits the EFB to the external framebuffer (XFB)
* @param src_rect Source rectangle in EFB to copy
* @param dst_rect Destination rectangle in EFB to copy to
* @param dest_height Destination height in pixels
* Renders external framebuffer (XFB)
* @param src_rect Source rectangle in XFB to copy
* @param dst_rect Destination rectangle in output framebuffer to copy to
*/
void RendererOpenGL::CopyToXFB(const Rect& src_rect, const Rect& dst_rect) {
void RendererOpenGL::RenderXFB(const Rect& src_rect, const Rect& dst_rect) {
static u8 xfb_top_flipped[VideoCore::kScreenTopWidth * VideoCore::kScreenTopWidth *3];
static u8 xfb_bottom_flipped[VideoCore::kScreenTopWidth * VideoCore::kScreenTopWidth *3];
_flip_framebuffer(0x20282160, xfb_top_flipped);
_flip_framebuffer(0x202118E0, xfb_bottom_flipped);
ResetRenderState();
// Blit the top framebuffer
// ------------------------
// Update textures with contents of XFB in RAM - top
glBindTexture(GL_TEXTURE_2D, xfb_texture_top_);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight,
GL_RGB, GL_UNSIGNED_BYTE, xfb_top_flipped);
glBindTexture(GL_TEXTURE_2D, 0);
// Render target is destination framebuffer
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_[kFramebuffer_VirtualXFB]);
glViewport(0, 0, resolution_width_, resolution_height_);
glViewport(0, 0, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight);
// Render source is our EFB
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_[kFramebuffer_EFB]);
glBindFramebuffer(GL_READ_FRAMEBUFFER, xfb_top_);
glReadBuffer(GL_COLOR_ATTACHMENT0);
// Blit
@ -92,9 +129,62 @@ void RendererOpenGL::CopyToXFB(const Rect& src_rect, const Rect& dst_rect) {
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
// Blit the bottom framebuffer
// ---------------------------
// Update textures with contents of XFB in RAM - bottom
glBindTexture(GL_TEXTURE_2D, xfb_texture_bottom_);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight,
GL_RGB, GL_UNSIGNED_BYTE, xfb_bottom_flipped);
glBindTexture(GL_TEXTURE_2D, 0);
// Render target is destination framebuffer
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_[kFramebuffer_VirtualXFB]);
glViewport(0, 0,
VideoCore::kScreenBottomWidth, VideoCore::kScreenBottomHeight);
// Render source is our EFB
glBindFramebuffer(GL_READ_FRAMEBUFFER, xfb_bottom_);
glReadBuffer(GL_COLOR_ATTACHMENT0);
// Blit
int offset = (VideoCore::kScreenTopWidth - VideoCore::kScreenBottomWidth) / 2;
glBlitFramebuffer(0,0, VideoCore::kScreenBottomWidth, VideoCore::kScreenBottomHeight,
offset, VideoCore::kScreenBottomHeight, VideoCore::kScreenBottomWidth + offset, 0,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
RestoreRenderState();
}
/**
* Blits the EFB to the external framebuffer (XFB)
* @param src_rect Source rectangle in EFB to copy
* @param dst_rect Destination rectangle in EFB to copy to
*/
void RendererOpenGL::CopyToXFB(const Rect& src_rect, const Rect& dst_rect) {
ERROR_LOG(RENDER, "CopyToXFB not implemented! No EFB support yet!");
//ResetRenderState();
//// Render target is destination framebuffer
//glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_[kFramebuffer_VirtualXFB]);
//glViewport(0, 0, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight);
//// Render source is our EFB
//glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_[kFramebuffer_EFB]);
//glReadBuffer(GL_COLOR_ATTACHMENT0);
//// Blit
//glBlitFramebuffer(src_rect.x0_, src_rect.y0_, src_rect.x1_, src_rect.y1_,
// dst_rect.x0_, dst_rect.y1_, dst_rect.x1_, dst_rect.y0_,
// GL_COLOR_BUFFER_BIT, GL_LINEAR);
//glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
//RestoreRenderState();
}
/**
* Clear the screen
* @param rect Screen rectangle to clear
@ -234,12 +324,13 @@ void RendererOpenGL::InitFramebuffer() {
for (int i = 0; i < kMaxFramebuffers; i++) {
// Generate color buffer storage
glBindRenderbuffer(GL_RENDERBUFFER, fbo_rbo_[i]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, resolution_width_, resolution_height_);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, VideoCore::kScreenTopWidth,
VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight);
// Generate depth buffer storage
glBindRenderbuffer(GL_RENDERBUFFER, fbo_depth_buffers_[i]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT32, resolution_width_,
resolution_height_);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT32, VideoCore::kScreenTopWidth,
VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight);
// Attach the buffers
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_[i]);
@ -257,6 +348,37 @@ void RendererOpenGL::InitFramebuffer() {
}
}
glBindFramebuffer(GL_FRAMEBUFFER, 0); // Unbind our frame buffer(s)
// Initialize framebuffer textures
// -------------------------------
// Create XFB textures
glGenTextures(1, &xfb_texture_top_);
glGenTextures(1, &xfb_texture_bottom_);
// Alocate video memorry for XFB textures
glBindTexture(GL_TEXTURE_2D, xfb_texture_top_);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight,
0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, 0);
glBindTexture(GL_TEXTURE_2D, xfb_texture_bottom_);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight,
0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, 0);
// Create the FBO and attach color/depth textures
glGenFramebuffers(1, &xfb_top_); // Generate framebuffer
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, xfb_top_);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
xfb_texture_top_, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glGenFramebuffers(1, &xfb_bottom_); // Generate framebuffer
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, xfb_bottom_);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
xfb_texture_bottom_, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
/// Blit the FBO to the OpenGL default framebuffer
@ -272,8 +394,7 @@ void RendererOpenGL::RenderFramebuffer() {
// Blit
glBlitFramebuffer(0, 0, resolution_width_, resolution_height_, 0, 0,
render_window_->client_area_width(), render_window_->client_area_height(),
GL_COLOR_BUFFER_BIT, GL_LINEAR);
resolution_width_, resolution_height_, GL_COLOR_BUFFER_BIT, GL_LINEAR);
// Update the FPS count
UpdateFramerate();

8
src/video_core/src/renderer_opengl/renderer_opengl.h
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@ -44,11 +44,17 @@ public:
/// Swap buffers (render frame)
void SwapBuffers();
/**
* Renders external framebuffer (XFB)
* @param src_rect Source rectangle in XFB to copy
* @param dst_rect Destination rectangle in output framebuffer to copy to
*/
void RenderXFB(const Rect& src_rect, const Rect& dst_rect);
/**
* Blits the EFB to the external framebuffer (XFB)
* @param src_rect Source rectangle in EFB to copy
* @param dst_rect Destination rectangle in EFB to copy to
* @param dest_height Destination height in pixels
*/
void CopyToXFB(const Rect& src_rect, const Rect& dst_rect);