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[client] Added GL_ARB_buffer_storage support

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This improves client performance by 4x if the video driver supports
this extension. OpenGL 4.1 is required for this feature to be used
This commit is contained in:
Geoffrey McRae 2017-11-19 10:36:35 +11:00
parent 9c90a53871
commit d1ef8d204a
1 changed files with 143 additions and 66 deletions
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183
client/main.c
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@ -27,7 +27,9 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include <stdbool.h>
#include <assert.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glu.h>
#include "debug.h"
#include "memcpySSE.h"
@ -37,10 +39,12 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "kb.h"
typedef void (*CompFunc)(uint8_t * dst, const uint8_t * src, const size_t len);
typedef void (*DrawFunc)(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src);
typedef void (*DrawFunc)(CompFunc compFunc, uint8_t * dst, const uint8_t * src);
struct KVMGFXState
{
bool hasBufferStorage;
bool running;
bool started;
bool windowChanged;
@ -90,64 +94,27 @@ inline bool areFormatsSame(const struct KVMGFXHeader s1, const struct KVMGFXHead
(s1.height == s2.height );
}
void drawFunc_ARGB10(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
{
SDL_UpdateTexture(texture, NULL, src, state.shm->stride * 4);
ivshmem_kick_irq(state.shm->guestID, 0);
}
void drawFunc_ARGB(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
void drawFunc_ARGB(CompFunc compFunc, uint8_t * dst, const uint8_t * src)
{
compFunc(dst, src, state.shm->height * state.shm->stride * 4);
ivshmem_kick_irq(state.shm->guestID, 0);
SDL_UnlockTexture(texture);
}
void drawFunc_RGB(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
void drawFunc_RGB(CompFunc compFunc, uint8_t * dst, const uint8_t * src)
{
compFunc(dst, src, state.shm->height * state.shm->stride * 3);
ivshmem_kick_irq(state.shm->guestID, 0);
SDL_UnlockTexture(texture);
}
void drawFunc_XOR(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
{
glEnable(GL_COLOR_LOGIC_OP);
glLogicOp(GL_XOR);
compFunc(dst, src, state.shm->height * state.shm->stride * 3);
ivshmem_kick_irq(state.shm->guestID, 0);
SDL_UnlockTexture(texture);
// clear the buffer for the next frame
memset(dst, 0, state.shm->height * state.shm->stride * 3);
}
void drawFunc_YUV444P(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
{
compFunc(dst, src, state.shm->height * state.shm->stride * 3);
ivshmem_kick_irq(state.shm->guestID, 0);
SDL_UnlockTexture(texture);
}
void drawFunc_YUV420P(CompFunc compFunc, SDL_Texture * texture, uint8_t * dst, const uint8_t * src)
{
const unsigned int pixels = state.shm->width * state.shm->height;
SDL_UpdateYUVTexture(texture, NULL,
src , state.shm->stride,
src + pixels , state.shm->stride / 2,
src + pixels + pixels / 4, state.shm->stride / 2
);
ivshmem_kick_irq(state.shm->guestID, 0);
}
int renderThread(void * unused)
{
struct KVMGFXHeader format;
SDL_Texture *texture = NULL;
GLuint vboID[2] = {0, 0};
GLuint vboTex = 0;
unsigned int texIndex = 0;
uint8_t *pixels = (uint8_t*)state.shm;
uint8_t *texPixels = NULL;
uint8_t *texPixels[2] = {NULL, NULL};
DrawFunc drawFunc = NULL;
CompFunc compFunc = NULL;
@ -196,22 +163,37 @@ int renderThread(void * unused)
// if the format is invalid or it has changed
if (!areFormatsSame(format, *state.shm))
{
if (state.hasBufferStorage)
{
if (vboID[0])
{
if (vboTex)
{
glDeleteTextures(1, &vboTex);
vboTex = 0;
}
glUnmapBuffer(GL_TEXTURE_BUFFER);
glDeleteBuffers(2, vboID);
memset(vboID, 0, sizeof(vboID));
}
}
else
{
if (texture)
{
SDL_DestroyTexture(texture);
texture = NULL;
}
}
Uint32 sdlFormat;
uint8_t bpp;
switch(state.shm->frameType)
{
case FRAME_TYPE_ARGB : sdlFormat = SDL_PIXELFORMAT_ARGB8888 ; drawFunc = drawFunc_ARGB ; break;
case FRAME_TYPE_RGB : sdlFormat = SDL_PIXELFORMAT_RGB24 ; drawFunc = drawFunc_RGB ; break;
case FRAME_TYPE_XOR : sdlFormat = SDL_PIXELFORMAT_RGB24 ; drawFunc = drawFunc_XOR ; break;
case FRAME_TYPE_YUV444P: sdlFormat = SDL_PIXELFORMAT_RGB24 ; drawFunc = drawFunc_YUV444P; break; // incorrect for now
case FRAME_TYPE_YUV420P: sdlFormat = SDL_PIXELFORMAT_YV12 ; drawFunc = drawFunc_YUV420P; break;
case FRAME_TYPE_ARGB10 : sdlFormat = SDL_PIXELFORMAT_ARGB2101010; drawFunc = drawFunc_ARGB10 ; break;
case FRAME_TYPE_ARGB : sdlFormat = SDL_PIXELFORMAT_ARGB8888 ; drawFunc = drawFunc_ARGB ; bpp = 4; break;
case FRAME_TYPE_RGB : sdlFormat = SDL_PIXELFORMAT_RGB24 ; drawFunc = drawFunc_RGB ; bpp = 3; break;
default:
format.frameType = FRAME_TYPE_INVALID;
continue;
@ -230,25 +212,113 @@ int renderThread(void * unused)
SDL_SetWindowSize(state.window, state.shm->width, state.shm->height);
SDL_SetWindowPosition(state.window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
texture = SDL_CreateTexture(state.renderer, sdlFormat, SDL_TEXTUREACCESS_STREAMING, state.shm->width, state.shm->height);
if (state.hasBufferStorage)
{
// setup two buffers so we don't have to use fences
const size_t bufferSize = state.shm->width * state.shm->height * bpp;
glGenBuffers(2, vboID);
for (int i = 0; i < 2; ++i)
{
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, vboID[i]);
glBufferStorage (GL_PIXEL_UNPACK_BUFFER, bufferSize, 0, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT);
texPixels[i] = glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, bufferSize, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT);
if (!texPixels[i])
{
DEBUG_ERROR("Failed to map buffer range, turning off buffer storage");
state.hasBufferStorage = false;
glDeleteBuffers(2, vboID);
memset(vboID, 0, sizeof(vboID));
continue;
}
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
// create the texture
glGenTextures(1, &vboTex);
glBindTexture(GL_TEXTURE_2D, vboTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S , GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T , GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_RGBA8,
state.shm->width, state.shm->height,
0,
GL_BGRA,
GL_UNSIGNED_BYTE,
(void*)0
);
glBindTexture(GL_TEXTURE_2D, 0);
}
else
{
texture = SDL_CreateTexture(state.renderer, sdlFormat, SDL_TEXTUREACCESS_STREAMING, state.shm->width, state.shm->height);
// this doesnt "lock" anything, pre-fetch the pointers for later use
int unused;
SDL_LockTexture(texture, NULL, (void**)&texPixels, &unused);
}
memcpy(&format, state.shm, sizeof(format));
state.windowChanged = true;
}
glDisable(GL_COLOR_LOGIC_OP);
drawFunc(compFunc, texture, texPixels, pixels + state.shm->dataPos);
if (state.hasBufferStorage)
{
// update the pixels
drawFunc(compFunc, texPixels[texIndex ? 0 : 1], pixels + state.shm->dataPos);
// update the texture
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, vboTex);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, vboID[texIndex ? 0 : 1]);
glTexSubImage2D(
GL_TEXTURE_2D,
0,
0, 0,
state.shm->width, state.shm->height,
GL_BGRA,
GL_UNSIGNED_BYTE,
(void*)0
);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
// draw the screen
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, 0.0f); glVertex2f(0.0f , 0.0f );
glTexCoord2f(1.0f, 0.0f); glVertex2f(state.shm->width, 0.0f );
glTexCoord2f(0.0f, 1.0f); glVertex2f(0.0f , state.shm->height);
glTexCoord2f(1.0f, 1.0f); glVertex2f(state.shm->width, state.shm->height);
glEnd();
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
// update our texture index
if (++texIndex == 2)
texIndex = 0;
}
else
{
drawFunc(compFunc, texPixels[0], pixels + state.shm->dataPos);
SDL_UnlockTexture(texture);
SDL_RenderCopy(state.renderer, texture, NULL, NULL);
}
SDL_RenderPresent(state.renderer);
state.started = true;
}
if (state.hasBufferStorage)
{
glDeleteTextures(1, &vboTex );
glUnmapBuffer (GL_TEXTURE_BUFFER);
glDeleteBuffers (2, vboID );
}
else
SDL_DestroyTexture(texture);
return 0;
}
@ -476,6 +546,13 @@ int main(int argc, char * argv[])
state.renderer = SDL_CreateRenderer(state.window, -1,
SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
const GLubyte * extensions = glGetString(GL_EXTENSIONS);
if (gluCheckExtension((const GLubyte *)"GL_ARB_buffer_storage", extensions))
{
DEBUG_INFO("Using GL_ARB_buffer_storage");
state.hasBufferStorage = true;
}
if (!state.renderer)
{
DEBUG_ERROR("failed to create window");