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RTT: Performance improved for DC RGB565 and ARGB4444 textures - glReadPixels() removed

This commit is contained in:
Marcel Szewczyk 2019-01-14 19:09:05 +01:00
parent 6499a82513
commit 77d997401b
1 changed files with 67 additions and 69 deletions
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132
core/rend/gles/gltex.cpp
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@ -413,6 +413,7 @@ struct FBT
u32 kval_bit;
u32 fb_alpha_threshold;
u32 fb_packmode;
bool is565;
bool texDataValid;
bool updated;
bool initialized;
@ -420,7 +421,8 @@ struct FBT
FBT(): initialized(false), updated(false), tf({0}), tex(0), renderTex(0), texDataValid(false) {}
};
void createTexture(u32 w, u32 h, u32 textureFormat, u32 textureType, GLuint & textureID) {
void createTexture(u32 w, u32 h, u32 textureFormat, u32 textureType, GLuint & textureID)
{
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_2D, textureID);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@ -452,8 +454,9 @@ void BindRTT(u32 addy, u32 fbw, u32 fbh, u32 channels, u32 fmt)
renderedTexture->fb_alpha_threshold = FB_W_CTRL.fb_alpha_threshold;
renderedTexture->w = fbw;
renderedTexture->h = fbh;
renderedTexture->is565 = (fmt == GL_UNSIGNED_SHORT_5_6_5);
if (!renderedTexture->tex) {
if (!renderedTexture->tex && (fmt != GL_UNSIGNED_SHORT_5_6_5) && (fmt != GL_UNSIGNED_SHORT_4_4_4_4)) {
createTexture(fbw, fbh, channels, fmt, renderedTexture->tex);
}
@ -587,67 +590,6 @@ void handleKRGB1555(GLint w, GLint h, FBT &fbt) {
}
}
void handleRGB565(GLint w, GLint h, FBT &fbt)
{
if (checkSupportedReadType() == GL_UNSIGNED_SHORT_5_6_5) {
// can be directly read
glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, fbt.texData);
}
else {
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, temp_tex_buffer_32);
// convert R8G8B8A8 to RGB565
const u32 *dataPointer32 = temp_tex_buffer_32;
for (u32 i = 0; i < w * h; i++) {
//additional variables just for better visibility
const u8 blue = ((*dataPointer32 & 0x00FF0000UL) >> 19); //5bits for blue
const u8 green = ((*dataPointer32 & 0x0000FF00UL) >> 10); //6bits for green
const u8 red = (*dataPointer32 & 0x000000FFUL) >> 3; //5bits for red
//convert to 16bit color
temp_tex_buffer_32[i] = (red << 11) | (green << 5) | blue;
*dataPointer32++;
//assign to 16bit buffer (type conversions should use static_cast<> in C++)
fbt.texData[i] = (u16)temp_tex_buffer_32[i];
}
}
}
void handleARGB4444(GLint w, GLint h, FBT &fbt)
{
if (checkSupportedReadType() == GL_UNSIGNED_SHORT_4_4_4_4) {
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, fbt.texData);
// convert RGBA4444 to ARGB4444
const u16 *dataPointer = fbt.texData;
for (u32 i = 0; i < w * h; i++) {
fbt.texData[i] = ((*dataPointer & 0x000F) << 12) | ((*dataPointer & 0xFFF0) >> 4);
*dataPointer++;
}
}
else {
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, temp_tex_buffer_32);
// convert R8G8B8A8 to ARGB4444
const u32 *dataPointer32 = temp_tex_buffer_32;
for (u32 i = 0; i < w * h; i++) {
//additional variables just for better visibility
const u8 alpha = ((*dataPointer32 & 0xFF000000UL) >> 28); //4bits for alpha
const u8 blue = ((*dataPointer32 & 0x00FF0000UL) >> 20); //4bits for blue
const u8 green = ((*dataPointer32 & 0x0000FF00UL) >> 12); //4bits for green
const u8 red = (*dataPointer32 & 0x000000FFUL) >> 4; //4bits for red
//convert to 16bit color with alpha swap
temp_tex_buffer_32[i] = (alpha << 12) | (red << 8) | (green << 4) | blue;
*dataPointer32++;
//assign to 16bit buffer (type conversions should use static_cast<> in C++)
fbt.texData[i] = (u16)temp_tex_buffer_32[i];
}
}
}
void handleARGB1555(GLint w, GLint h, FBT &fbt) {
const u32 fb_alpha_threshold = fbt.fb_alpha_threshold;
GLint framebufferReadType = checkSupportedReadType();
@ -710,13 +652,14 @@ void handlePackModeRTT(GLint w, GLint h, FBT &fbt)
case 1: //0x1 565 RGB 16 bit
{
handleRGB565(w, h, fbt);
//handled elsewhere
break;
}
case 2: //0x2 4444 ARGB 16 bit
{
handleARGB4444(w, h, fbt);
fbt.tex = fbt.renderTex;
fbt.updated = false;
break;
}
@ -777,7 +720,9 @@ void ReadRTT()
}
else if (settings.dreamcast.rttOption == Full)
{
if (fbt.fb_packmode != 1) {
glBindFramebuffer(GL_FRAMEBUFFER, fbt.fbo);
}
if (!fbt.texDataValid) {
handlePackModeRTT(w, h, fbt);
}
@ -815,8 +760,55 @@ void initializeRttTexture(const TSP & tsp, const TCW & tcw, FBT * tempRenderedTe
}
}
GLuint gl_GetTexture(TSP tsp, TCW tcw) {
void handleRGB565Exceptions(FBT &fbt, u32 newTexAddr)
{
GLint w = fbt.w;
GLint h = fbt.h;
if (fbt.tf.tex->type != GL_UNSIGNED_SHORT_5_6_5)
{
if (!fbt.tex || (fbt.tex == fbt.renderTex)) {
createTexture((u32) w, (u32) h, GL_RGBA, fbt.tf.tex->type, fbt.tex);
}
fbt.tf.texID = fbt.tex;
glBindFramebuffer(GL_FRAMEBUFFER, fbt.fbo);
if (checkSupportedReadType() == GL_UNSIGNED_SHORT_5_6_5) {
// can be directly read
glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, fbt.texData);
}
else {
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, temp_tex_buffer_32);
// convert R8G8B8A8 to RGB565
const u32 *dataPointer32 = temp_tex_buffer_32;
for (u32 i = 0; i < w * h; i++) {
//additional variables just for better visibility
const u8 blue = ((*dataPointer32 & 0x00FF0000UL) >> 19); //5bits for blue
const u8 green = ((*dataPointer32 & 0x0000FF00UL) >> 10); //6bits for green
const u8 red = (*dataPointer32 & 0x000000FFUL) >> 3; //5bits for red
//convert to 16bit color
temp_tex_buffer_32[i] = (red << 11) | (green << 5) | blue;
*dataPointer32++;
//assign to 16bit buffer (type conversions should use static_cast<> in C++)
fbt.texData[i] = (u16)temp_tex_buffer_32[i];
}
}
delayedUpdateQueue.insert(newTexAddr);
}
else {
if (fbt.tex && (fbt.tex != fbt.renderTex)) { //to avoid memory leaks
glDeleteTextures(1, &fbt.tex);
}
fbt.tex = fbt.renderTex;
fbt.updated = false;
}
}
GLuint gl_GetTexture(TSP tsp, TCW tcw)
{
FBT* tempRenderedTexture = NULL;
map<u32, FBT>::iterator it = renderedTextures.find(tcw.TexAddr);
if (it != renderedTextures.end()) {
@ -830,13 +822,19 @@ GLuint gl_GetTexture(TSP tsp, TCW tcw) {
//if there was no update, it is not an RTT frame (BindRTT was not invoked) then proceed the standard way
if (tempRenderedTexture->tf.tcw.full == tcw.full)
{
if (tempRenderedTexture->updated)
if (tempRenderedTexture->updated && !tempRenderedTexture->is565)
{
delayedUpdateQueue.insert(tcw.TexAddr);
tempRenderedTexture->tf.tsp = tsp;
tempRenderedTexture->tf.Create(false);
tempRenderedTexture->tf.texID = tempRenderedTexture->tex;
}
else if (tempRenderedTexture->updated && tempRenderedTexture->is565)
{
tempRenderedTexture->tf.tsp = tsp;
tempRenderedTexture->tf.Create(false);
handleRGB565Exceptions(*tempRenderedTexture, tcw.TexAddr);
}
return tempRenderedTexture->tex;
}
}