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Rewrite DepthBufferToRDRAM

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This commit is contained in:
Sergey Lipskiy 2015-01-28 19:58:55 +06:00
parent afe91d47d9
commit cd758aed08
1 changed files with 43 additions and 18 deletions
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61
FrameBuffer.cpp
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@ -1,4 +1,5 @@
#include <assert.h>
#include <math.h>
#include "OpenGL.h"
#include "FrameBuffer.h"
#include "DepthBuffer.h"
@ -69,6 +70,7 @@ private:
GLuint m_PBO;
CachedTexture * m_pTexture;
u32 m_lastDList;
u16 * zLUT;
};
#endif // GLES2
@ -703,26 +705,43 @@ void DepthBufferToRDRAM::Init()
m_pTexture->maskT = 0;
m_pTexture->mirrorS = 0;
m_pTexture->mirrorT = 0;
m_pTexture->realWidth = 1024;
m_pTexture->realHeight = 512;
m_pTexture->textureBytes = m_pTexture->realWidth * m_pTexture->realHeight * 2;
m_pTexture->realWidth = 640;
m_pTexture->realHeight = 480;
m_pTexture->textureBytes = m_pTexture->realWidth * m_pTexture->realHeight * sizeof(float);
textureCache().addFrameBufferTextureSize(m_pTexture->textureBytes);
glBindTexture( GL_TEXTURE_2D, m_pTexture->glName );
glTexImage2D(GL_TEXTURE_2D, 0, GL_R16, m_pTexture->realWidth, m_pTexture->realHeight, 0, GL_RED, GL_UNSIGNED_SHORT, NULL);
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, m_pTexture->realWidth, m_pTexture->realHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glBindTexture(GL_TEXTURE_2D, 0);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_pTexture->glName, 0);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_pTexture->glName, 0);
// check if everything is OK
assert(checkFBO());
assert(!isGLError());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
// Generate and initialize Pixel Buffer Objects
glGenBuffers(1, &m_PBO);
glBindBuffer(GL_PIXEL_PACK_BUFFER, m_PBO);
glBufferData(GL_PIXEL_PACK_BUFFER, 640*480*2, NULL, GL_DYNAMIC_DRAW);
glBufferData(GL_PIXEL_PACK_BUFFER, 640*480*sizeof(float), NULL, GL_DYNAMIC_DRAW);
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
zLUT = new u16[0x40000];
for (int i = 0; i<0x40000; i++) {
u32 exponent = 0;
u32 testbit = 1 << 17;
while ((i & testbit) && (exponent < 7)) {
exponent++;
testbit = 1 << (17 - exponent);
}
u32 mantissa = (i >> (6 - (6 < exponent ? 6 : exponent))) & 0x7ff;
zLUT[i] = (u16)(((exponent << 11) | mantissa) << 2);
}
}
void DepthBufferToRDRAM::Destroy() {
@ -735,6 +754,8 @@ void DepthBufferToRDRAM::Destroy() {
}
glDeleteBuffers(1, &m_PBO);
m_PBO = 0;
delete[] zLUT;
zLUT = 0;
}
bool DepthBufferToRDRAM::CopyToRDRAM( u32 _address) {
@ -750,22 +771,18 @@ bool DepthBufferToRDRAM::CopyToRDRAM( u32 _address) {
glDisable(GL_SCISSOR_TEST);
DepthBuffer * pDepthBuffer = pBuffer->m_pDepthBuffer;
const u32 address = pDepthBuffer->m_address;
glBindFramebuffer(GL_READ_FRAMEBUFFER, pDepthBuffer->m_FBO);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, pBuffer->m_FBO);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_FBO);
GLuint attachment = GL_COLOR_ATTACHMENT0;
glDrawBuffers(1, &attachment);
glBlitFramebuffer(
0, 0, video().getWidth(), video().getHeight(),
0, 0, pBuffer->m_width, pBuffer->m_height,
GL_COLOR_BUFFER_BIT, GL_LINEAR
GL_DEPTH_BUFFER_BIT, GL_NEAREST
);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, frameBufferList().getCurrent()->m_FBO);
glBindBuffer(GL_PIXEL_PACK_BUFFER, m_PBO);
glBindFramebuffer(GL_READ_FRAMEBUFFER, m_FBO);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glReadPixels( 0, 0, VI.width, VI.height, GL_RED, GL_UNSIGNED_SHORT, 0 );
glReadPixels(0, 0, VI.width, VI.height, GL_DEPTH_COMPONENT, GL_FLOAT, 0);
glBindBuffer(GL_PIXEL_PACK_BUFFER, m_PBO);
GLubyte* pixelData = (GLubyte*)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
@ -774,14 +791,22 @@ bool DepthBufferToRDRAM::CopyToRDRAM( u32 _address) {
return false;
}
u16 * ptr_src = (u16*)pixelData;
f32 * ptr_src = (f32*)pixelData;
u16 *ptr_dst = (u16*)(RDRAM + address);
u16 col;
const float scale = gSP.viewport.vscale[2] * 32768.0f;
const float trans = gSP.viewport.vtrans[2] * 32768.0f;
for (u32 y = 0; y < VI.height; ++y) {
for (u32 x = 0; x < VI.width; ++x) {
col = min((u16)0xfffc, ptr_src[x + (VI.height - y - 1)*VI.width]);
ptr_dst[(x + y*VI.width)^1] = col;
float z = ptr_src[x + (VI.height - y - 1)*VI.width];
if (z == 1.0f)
ptr_dst[(x + y*VI.width) ^ 1] = zLUT[0x3FFFF];
else {
z = z*2.0f - 1.0f;
z = (z*scale + trans) * 8.0f;
const u32 idx = min(0x3FFFFU, u32(floorf(z + 0.5f)));
ptr_dst[(x + y*VI.width) ^ 1] = zLUT[idx];
}
}
}