mirror-games/glest-source
1
0
Fork 0
mirror of https://github.com/glest/glest-source.git synced 2025-08-30 03:09:49 +02:00
Code Issues Projects Releases Wiki Activity

- added FBO's for map preview rendering, which improves fps in the custom menu for video cards that support Frame Buffer Objects

Browse Source
This commit is contained in:
Mark Vejvoda
2011-02-08 05:54:05 +00:00
parent dd75518af0
commit 86baa04a3b
4 changed files with 372 additions and 329 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
source/shared_lib/include/graphics/gl/texture_gl.h
View File

@@ -28,6 +28,10 @@ protected:
GLuint renderBufferId;
GLuint frameBufferId;
void initRenderBuffer();
void initFrameBuffer();
void attachRenderBuffer();
public:
TextureGl();
virtual ~TextureGl();
@@ -36,14 +40,11 @@ public:
GLuint getRenderBufferHandle() const {return renderBufferId;}
GLuint getFrameBufferHandle() const {return frameBufferId;}
void initRenderBuffer();
void initFrameBuffer();
void attachRenderBuffer();
void attachFrameBufferToTexture();
bool checkFrameBufferStatus();
void dettachFrameBufferFromTexture();
bool supports_FBO_RBO();
void setup_FBO_RBO();
void attachFrameBufferToTexture();
void dettachFrameBufferFromTexture();
bool checkFrameBufferStatus();
void teardown_FBO_RBO();
virtual int getTextureWidth() const = 0;

264
source/shared_lib/sources/graphics/gl/texture_gl.cpp
View File

@@ -21,11 +21,39 @@
using namespace std;
// Define FBO's (Frame Buffer Objects) for win32
#ifdef WIN32
PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;
PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;
PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;
PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;
PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;
#endif
namespace Shared { namespace Graphics { namespace Gl {
using namespace Platform;
using namespace Shared::Util;
void setupGLExtensionMethods() {
#ifdef WIN32
static bool setupExtensions=true;
if(setupExtensions == true) {
setupExtensions = false;
glGenFramebuffersEXT= (PFNGLGENFRAMEBUFFERSEXTPROC)SDL_GL_GetProcAddress("glGenFramebuffersEXT");
glBindFramebufferEXT= (PFNGLBINDFRAMEBUFFEREXTPROC)SDL_GL_GetProcAddress("glBindFramebufferEXT");
glFramebufferTexture2DEXT= (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)SDL_GL_GetProcAddress("glFramebufferTexture2DEXT");
glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)SDL_GL_GetProcAddress("glDeleteFramebuffersEXT");
glCheckFramebufferStatusEXT= (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)SDL_GL_GetProcAddress("glCheckFramebufferStatusEXT");
}
#endif
}
const uint64 MIN_BYTES_TO_COMPRESS = 12;
static std::string getSupportCompressedTextureFormatString(int format) {
@@ -425,6 +453,11 @@ TextureGl::TextureGl() {
handle = 0;
renderBufferId = 0;
frameBufferId = 0;
setupGLExtensionMethods();
}
bool TextureGl::supports_FBO_RBO() {
return (glGenFramebuffersEXT != NULL);
}
void TextureGl::setup_FBO_RBO() {
@@ -432,158 +465,149 @@ void TextureGl::setup_FBO_RBO() {
throw runtime_error("getTextureWidth() < 0 || getTextureHeight() < 0");
}
SystemFlags::OutputDebug(SystemFlags::debugSystem,"getTextureWidth() = %d, getTextureHeight() = %d\n",getTextureWidth(),getTextureHeight());
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"getTextureWidth() = %d, getTextureHeight() = %d\n",getTextureWidth(),getTextureHeight());
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// Need some work to get extensions properly working in Windows (use Glew lib)
// Did we successfully setup FBO's?
if(glGenFramebuffersEXT) {
GLint width=0;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&width);
GLint height=0;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&height);
GLint width=0;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&width);
GLint height=0;
glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&height);
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"width = %d, height = %d\n",width,height);
SystemFlags::OutputDebug(SystemFlags::debugSystem,"width = %d, height = %d\n",width,height);
//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_RGBA8, 256, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
//-------------------------
glGenFramebuffersEXT(1, &frameBufferId);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
//Attach 2D texture to this FBO
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, handle, 0);
//-------------------------
glGenRenderbuffersEXT(1, &renderBufferId);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderBufferId);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, getTextureWidth(), getTextureHeight());
//-------------------------
//Attach depth buffer to FBO
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, renderBufferId);
//-------------------------
//Does the GPU support current FBO configuration?
GLenum status;
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch(status)
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
SystemFlags::OutputDebug(SystemFlags::debugSystem,"FBO attachment OK!\n");
break;
default:
SystemFlags::OutputDebug(SystemFlags::debugSystem,"FBO attachment BAD!\n");
break;
//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_RGBA8, 256, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
//-------------------------
glGenFramebuffersEXT(1, &frameBufferId);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
//Attach 2D texture to this FBO
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, handle, 0);
//-------------------------
glGenRenderbuffersEXT(1, &renderBufferId);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderBufferId);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, getTextureWidth(), getTextureHeight());
//-------------------------
//Attach depth buffer to FBO
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, renderBufferId);
//-------------------------
//Does the GPU support current FBO configuration?
GLenum status;
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch(status)
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"FBO attachment OK!\n");
break;
default:
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"FBO attachment BAD!\n");
break;
}
//-------------------------
//and now you can render to GL_TEXTURE_2D
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
//-------------------------
//and now you can render to GL_TEXTURE_2D
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#endif
}
void TextureGl::teardown_FBO_RBO() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
//----------------
//Bind 0, which means render to back buffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
//And in the end, cleanup
//Delete resources
//glDeleteTextures(1, &handle);
glDeleteRenderbuffersEXT(1, &frameBufferId);
//Bind 0, which means render to back buffer, as a result, fb is unbound
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &frameBufferId);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
//----------------
//Bind 0, which means render to back buffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
//And in the end, cleanup
//Delete resources
//glDeleteTextures(1, &handle);
glDeleteRenderbuffersEXT(1, &frameBufferId);
//Bind 0, which means render to back buffer, as a result, fb is unbound
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &frameBufferId);
}
}
void TextureGl::initRenderBuffer() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// create a renderbuffer object to store depth info
glGenRenderbuffersEXT(1, &renderBufferId);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderBufferId);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,getTextureWidth(), getTextureHeight());
//glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// create a renderbuffer object to store depth info
glGenRenderbuffersEXT(1, &renderBufferId);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, renderBufferId);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,getTextureWidth(), getTextureHeight());
//glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
}
}
void TextureGl::initFrameBuffer() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// create a framebuffer object
glGenFramebuffersEXT(1, &frameBufferId);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// create a framebuffer object
glGenFramebuffersEXT(1, &frameBufferId);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferId);
}
}
void TextureGl::attachRenderBuffer() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// attach the renderbuffer to depth attachment point
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT, renderBufferId);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// attach the renderbuffer to depth attachment point
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT, renderBufferId);
}
}
void TextureGl::attachFrameBufferToTexture() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// attach the texture to FBO color attachment point
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, handle, 0);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// attach the texture to FBO color attachment point
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, handle, 0);
}
}
bool TextureGl::checkFrameBufferStatus() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// check FBO status
// Does the GPU support current FBO configuration?
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if(status != GL_FRAMEBUFFER_COMPLETE_EXT) {
SystemFlags::OutputDebug(SystemFlags::debugSystem,"checkFrameBufferStatus() status = %d [%X]\n",status,status);
return false;
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// check FBO status
// Does the GPU support current FBO configuration?
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if(status != GL_FRAMEBUFFER_COMPLETE_EXT) {
SystemFlags::OutputDebug(SystemFlags::debugSystem,"checkFrameBufferStatus() status = %d [%X]\n",status,status);
return false;
}
return true;
}
return true;
#else
return false;
#endif
}
void TextureGl::dettachFrameBufferFromTexture() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
// switch back to window-system-provided framebuffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
#endif
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
// switch back to window-system-provided framebuffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
}
TextureGl::~TextureGl() {
// Need some work to get extensions properly working in Windows (use Glew lib)
#ifndef WIN32
if(renderBufferId != 0) {
glDeleteRenderbuffersEXT(1, &renderBufferId);
renderBufferId = 0;
// Need some work to get extensions properly working in Windows (use Glew lib)
if(glGenFramebuffersEXT) {
if(renderBufferId != 0) {
glDeleteRenderbuffersEXT(1, &renderBufferId);
renderBufferId = 0;
}
if(frameBufferId != 0) {
glDeleteFramebuffersEXT(1, &frameBufferId);
frameBufferId = 0;
}
//glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
if(frameBufferId != 0) {
glDeleteFramebuffersEXT(1, &frameBufferId);
frameBufferId = 0;
}
//glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
#endif
}
// =====================================================