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[DEV] Add capability to use FBO (Frame Buffer Object)

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This commit is contained in:
Edouard DUPIN 2017-06-28 08:29:17 +02:00
parent bd0c899654
commit 9f4250cbdc
2 changed files with 89 additions and 21 deletions
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105
ewol/resource/Texture.cpp
View File

@ -38,6 +38,9 @@ void ewol::resource::Texture::init() {
ewol::resource::Texture::Texture() :
m_texId(0),
#ifdef EWOL_USE_FBO
m_texPboId(0),
#ifdef EWOL_USE_FBO
m_data(ivec2(32,32),egami::colorType::RGBA8),
m_lastSize(1,1),
m_loaded(false),
@ -68,22 +71,37 @@ bool ewol::resource::Texture::updateContext() {
}
int32_t typeObject = GL_RGBA;
int32_t sizeObject = GL_UNSIGNED_BYTE;
#ifdef EWOL_USE_FBO
int32_t sizeByte = 1;
#endif
switch (m_data.getType()) {
case egami::colorType::RGBA8:
typeObject = GL_RGBA;
sizeObject = GL_UNSIGNED_BYTE;
#ifdef EWOL_USE_FBO
sizeByte = 4;
#endif
break;
case egami::colorType::RGB8:
typeObject = GL_RGB;
sizeObject = GL_UNSIGNED_BYTE;
#ifdef EWOL_USE_FBO
sizeByte = 3;
#endif
break;
case egami::colorType::RGBAf:
typeObject = GL_RGBA;
sizeObject = GL_FLOAT;
#ifdef EWOL_USE_FBO
sizeByte = 16;
#endif
break;
case egami::colorType::RGBf:
typeObject = GL_RGBA;
sizeObject = GL_FLOAT;
#ifdef EWOL_USE_FBO
sizeByte = 12;
#endif
break;
case egami::colorType::unsignedInt16:
case egami::colorType::unsignedInt32:
@ -104,6 +122,18 @@ bool ewol::resource::Texture::updateContext() {
if (m_loaded == false) {
// Request a new texture at openGl :
glGenTextures(1, &m_texId);
#ifdef EWOL_USE_FBO
EWOL_ERROR("CREATE PBO");
glGenBuffers(1, &m_texPboId);
EWOL_ERROR("CREATE PBO 1");
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, m_texPboId);
EWOL_ERROR("CREATE PBO 2");
glBufferData(GL_PIXEL_UNPACK_BUFFER, m_data.getGPUSize().x()*m_data.getGPUSize().y()*sizeByte, 0, GL_STREAM_DRAW);
EWOL_ERROR("CREATE PBO 3");
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
EWOL_ERROR("CREATE PBO 4 (done)");
#endif
m_lastSize = m_data.getSize();
m_lastTypeObject = typeObject;
m_lastSizeObject = sizeObject;
@ -142,28 +172,61 @@ bool ewol::resource::Texture::updateContext() {
tmpData.resize(bufferSize, 0.0f);
}
EWOL_DEBUG(" CREATE texture ==> " << m_data.getGPUSize());
// 2 create a new emprty texture:
glTexImage2D(GL_TEXTURE_2D, // Target
0, // Level
typeObject, // Format internal
m_data.getGPUSize().x(),
m_data.getGPUSize().y(),
0, // Border
typeObject, // format
sizeObject, // type
&tmpData[0] );
gale::openGL::flush();
// 2 create a new empty texture:
#ifdef EWOL_USE_FBO
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, m_texPboId);
void* pBuff = ::glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, m_data.getGPUSize().x() * m_data.getGPUSize().y() * sizeByte, GL_MAP_WRITE_BIT);
memcpy(pBuff, &tmpData[0], m_data.getGPUSize().x()*m_data.getGPUSize().y()*sizeByte);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
glTexImage2D(GL_TEXTURE_2D, // Target
0, // Level
typeObject, // Format internal
m_data.getGPUSize().x(),
m_data.getGPUSize().y(),
0, // Border
typeObject, // format
sizeObject, // type
(void*)0 );
#else
glTexImage2D(GL_TEXTURE_2D, // Target
0, // Level
typeObject, // Format internal
m_data.getGPUSize().x(),
m_data.getGPUSize().y(),
0, // Border
typeObject, // format
sizeObject, // type
&tmpData[0] );
#endif
}
//3 Flush all time the data:
glTexSubImage2D(GL_TEXTURE_2D, // Target
0, // Level
0, // x offset
0, // y offset
m_data.getWidth(),
m_data.getHeight(),
typeObject, // format
sizeObject, // type
m_data.getTextureDataPointer() );
#ifdef EWOL_USE_FBO
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, m_texPboId);
void* pBuff = ::glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, m_data.getGPUSize().x() * m_data.getGPUSize().y() * sizeByte, GL_MAP_WRITE_BIT);
memcpy(pBuff, m_data.getTextureDataPointer(), m_data.getWidth()*m_data.getHeight()*sizeByte);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
//3 Flush all time the data:
glTexSubImage2D(GL_TEXTURE_2D, // Target
0, // Level
0, // x offset
0, // y offset
m_data.getWidth(),
m_data.getHeight(),
typeObject, // format
sizeObject, // type
(void *)0 );
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
#else
//3 Flush all time the data:
glTexSubImage2D(GL_TEXTURE_2D, // Target
0, // Level
0, // x offset
0, // y offset
m_data.getWidth(),
m_data.getHeight(),
typeObject, // format
sizeObject, // type
m_data.getTextureDataPointer() );
#endif
#else
// This is the normal case ==> set the image and after set just the update of the data
if (m_loaded == false) {

5
ewol/resource/Texture.hpp
View File

@ -10,11 +10,16 @@
#include <egami/Image.hpp>
#include <gale/resource/Texture.hpp>
//#define EWOL_USE_FBO 1
namespace ewol {
namespace resource {
class Texture : public gale::Resource {
protected:
uint32_t m_texId; //!< openGl textureID.
#ifdef EWOL_USE_FBO
uint32_t m_texPboId; //!< openGl textureID.
#endif
// openGl Context propoerties :
egami::Image m_data;
// some image are not square == > we need to sqared it to prevent some openGl api error the the displayable size is not all the time 0.0 -> 1.0