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- [Psy-X] offscreen target blit to GPU instance of PSX VRAM

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This commit is contained in:
Ilya Shurumov 2021-01-09 15:11:07 +06:00
parent 4394c66e0d
commit 78e8bb3aea
1 changed files with 42 additions and 11 deletions
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53
src_rebuild/PsyX/src/RENDER/PsyX_RENDER.C
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@ -8,6 +8,9 @@
#include "PSYX_GLOBALS.H"
#define USE_PBO 1
#define USE_OFFSCREEN_BLIT 1
extern SDL_Window* g_window;
extern int g_swapInterval;
@ -57,8 +60,6 @@ struct GrPBO
unsigned char* pixels; /* the downloaded pixels. */
};
#define USE_PBO 1
int PBO_Init(GrPBO& pbo, GLenum format, int w, int h, int num)
{
#if USE_PBO
@ -195,6 +196,8 @@ GLuint g_glVertexBuffer;
GLuint g_glBlitFramebuffer;
GrPBO g_glFramebufferPBO;
GLuint g_glVRAMFramebuffer;
GLuint g_glOffscreenFramebuffer;
GrPBO g_glOffscreenPBO;
@ -945,6 +948,18 @@ int GR_InitialisePSX()
}
glBindTexture(GL_TEXTURE_2D, 0);
// VRAM framebuffer for offscreen blitting to VRAM
glGenFramebuffers(1, &g_glVRAMFramebuffer);
{
glBindFramebuffer(GL_FRAMEBUFFER, g_glVRAMFramebuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, g_vramTexture, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
}
// gen vertex buffer and index buffer
@ -1359,25 +1374,41 @@ void GR_SetOffscreenState(const RECT16& offscreenRect, int enable)
else
{
GR_SetViewPort(0, 0, g_windowWidth, g_windowHeight);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glFlush();
#if USE_OFFSCREEN_BLIT
// before drawing set source and target
{
glBindFramebuffer(GL_FRAMEBUFFER, g_glVRAMFramebuffer);
// setup draw and read framebuffers
glBindFramebuffer(GL_READ_FRAMEBUFFER, g_glOffscreenFramebuffer); // source is backbuffer
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, g_glVRAMFramebuffer);
glBlitFramebuffer(0, 0, g_PreviousOffscreen.w, g_PreviousOffscreen.h,
g_PreviousOffscreen.x, g_PreviousOffscreen.y + g_PreviousOffscreen.h, g_PreviousOffscreen.x + g_PreviousOffscreen.w, g_PreviousOffscreen.y,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
// done, unbind
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
}
#endif
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// copy rendering results to VRAM texture
{
//uint* data = (uint*)malloc(g_PreviousOffscreen.w * g_PreviousOffscreen.h * sizeof(uint));
#if defined(RENDERER_OGL) || defined(OGLES)
// reat the texture
glBindTexture(GL_TEXTURE_2D, g_offscreenRTTexture);
//glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
PBO_Download(g_glOffscreenPBO);
glBindTexture(GL_TEXTURE_2D, g_lastBoundTexture);
GR_CopyRGBAFramebufferToVRAM((u_int*)g_glOffscreenPBO.pixels, g_PreviousOffscreen.x, g_PreviousOffscreen.y, g_PreviousOffscreen.w, g_PreviousOffscreen.h, 1, 1);
#endif
//free(data);
// Don't forcely update VRAM
GR_CopyRGBAFramebufferToVRAM((u_int*)g_glOffscreenPBO.pixels,
g_PreviousOffscreen.x, g_PreviousOffscreen.y, g_PreviousOffscreen.w, g_PreviousOffscreen.h,
USE_OFFSCREEN_BLIT == 0, 1);
}
}
#endif
}