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sdk: GL blitter

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git-svn-id: svn://kolibrios.org@4502 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2014-01-21 14:25:30 +00:00
parent d605acf341
commit f53662a0f4
6 changed files with 677 additions and 41 deletions
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82
contrib/sdk/sources/libdrm/include/drm/i915_drm.h
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@ -141,58 +141,58 @@ typedef struct _drm_i915_sarea {
/* Flags for perf_boxes
*/
#define I915_BOX_RING_EMPTY 0x1
#define I915_BOX_FLIP 0x2
#define I915_BOX_WAIT 0x4
#define I915_BOX_TEXTURE_LOAD 0x8
#define I915_BOX_LOST_CONTEXT 0x10
#define I915_BOX_RING_EMPTY 0x1
#define I915_BOX_FLIP 0x2
#define I915_BOX_WAIT 0x4
#define I915_BOX_TEXTURE_LOAD 0x8
#define I915_BOX_LOST_CONTEXT 0x10
/* I915 specific ioctls
* The device specific ioctl range is 0x40 to 0x79.
*/
#define DRM_I915_INIT 0x00
#define DRM_I915_FLUSH 0x01
#define DRM_I915_FLIP 0x02
#define DRM_I915_BATCHBUFFER 0x03
#define DRM_I915_IRQ_EMIT 0x04
#define DRM_I915_IRQ_WAIT 0x05
#define DRM_I915_GETPARAM 0x06
#define DRM_I915_SETPARAM 0x07
#define DRM_I915_ALLOC 0x08
#define DRM_I915_FREE 0x09
#define DRM_I915_INIT_HEAP 0x0a
#define DRM_I915_CMDBUFFER 0x0b
#define DRM_I915_DESTROY_HEAP 0x0c
#define DRM_I915_INIT 0x00
#define DRM_I915_FLUSH 0x01
#define DRM_I915_FLIP 0x02
#define DRM_I915_BATCHBUFFER 0x03
#define DRM_I915_IRQ_EMIT 0x04
#define DRM_I915_IRQ_WAIT 0x05
#define DRM_I915_GETPARAM 0x06
#define DRM_I915_SETPARAM 0x07
#define DRM_I915_ALLOC 0x08
#define DRM_I915_FREE 0x09
#define DRM_I915_INIT_HEAP 0x0a
#define DRM_I915_CMDBUFFER 0x0b
#define DRM_I915_DESTROY_HEAP 0x0c
#define DRM_I915_SET_VBLANK_PIPE 0x0d
#define DRM_I915_GET_VBLANK_PIPE 0x0e
#define DRM_I915_VBLANK_SWAP 0x0f
#define DRM_I915_HWS_ADDR 0x11
#define DRM_I915_GEM_INIT 0x13
#define DRM_I915_GEM_EXECBUFFER 0x14
#define DRM_I915_GEM_PIN 0x15
#define DRM_I915_GEM_UNPIN 0x16
#define DRM_I915_GEM_BUSY 0x17
#define DRM_I915_GEM_THROTTLE 0x18
#define DRM_I915_GEM_ENTERVT 0x19
#define DRM_I915_GEM_LEAVEVT 0x1a
#define DRM_I915_GEM_CREATE 0x1b
#define DRM_I915_GEM_PREAD 0x1c
#define DRM_I915_GEM_PWRITE 0x1d
#define DRM_I915_GEM_MMAP 0x1e
#define DRM_I915_GEM_SET_DOMAIN 0x1f
#define DRM_I915_GEM_SW_FINISH 0x20
#define DRM_I915_GEM_SET_TILING 0x21
#define DRM_I915_GEM_GET_TILING 0x22
#define DRM_I915_GEM_GET_APERTURE 0x23
#define DRM_I915_GEM_MMAP_GTT 0x24
#define DRM_I915_VBLANK_SWAP 0x0f
#define DRM_I915_HWS_ADDR 0x11
#define DRM_I915_GEM_INIT 0x13
#define DRM_I915_GEM_EXECBUFFER 0x14
#define DRM_I915_GEM_PIN 0x15
#define DRM_I915_GEM_UNPIN 0x16
#define DRM_I915_GEM_BUSY 0x17
#define DRM_I915_GEM_THROTTLE 0x18
#define DRM_I915_GEM_ENTERVT 0x19
#define DRM_I915_GEM_LEAVEVT 0x1a
#define DRM_I915_GEM_CREATE 0x1b
#define DRM_I915_GEM_PREAD 0x1c
#define DRM_I915_GEM_PWRITE 0x1d
#define DRM_I915_GEM_MMAP 0x1e
#define DRM_I915_GEM_SET_DOMAIN 0x1f
#define DRM_I915_GEM_SW_FINISH 0x20
#define DRM_I915_GEM_SET_TILING 0x21
#define DRM_I915_GEM_GET_TILING 0x22
#define DRM_I915_GEM_GET_APERTURE 0x23
#define DRM_I915_GEM_MMAP_GTT 0x24
#define DRM_I915_GET_PIPE_FROM_CRTC_ID 0x25
#define DRM_I915_GEM_MADVISE 0x26
#define DRM_I915_GEM_MADVISE 0x26
#define DRM_I915_OVERLAY_PUT_IMAGE 0x27
#define DRM_I915_OVERLAY_ATTRS 0x28
#define DRM_I915_OVERLAY_ATTRS 0x28
#define DRM_I915_GEM_EXECBUFFER2 0x29
#define DRM_I915_GET_SPRITE_COLORKEY 0x2a
#define DRM_I915_SET_SPRITE_COLORKEY 0x2b
#define DRM_I915_GEM_WAIT 0x2c
#define DRM_I915_GEM_WAIT 0x2c
#define DRM_I915_GEM_CONTEXT_CREATE 0x2d
#define DRM_I915_GEM_CONTEXT_DESTROY 0x2e
#define DRM_I915_GEM_SET_CACHEING 0x2f

42
contrib/sdk/sources/render/Makefile Normal file
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@ -0,0 +1,42 @@
LIBRARY= librender
CC=gcc
CFLAGS = -U_Win32 -U_WIN32 -U__MINGW32__ -c -O2 -fomit-frame-pointer
AR= ar
INCLUDES= -I. -I../newlib/include -I../Mesa/include -I../libdrm/include/drm
LIBPATH:= -L../../lib
DEFINES= -D__unix__ -DMESA_EGL_NO_X11_HEADERS
SOURCES = render.c \
blit.c \
swap.c
OBJECTS = $(patsubst %.c, %.o, $(SOURCES))
# targets
all:$(LIBRARY).a
$(LIBRARY).a: $(OBJECTS) Makefile
ar cvrs $(LIBRARY).a $(OBJECTS)
mv -f $(LIBRARY).a ../../lib
%.o : %.c Makefile
$(CC) $(CFLAGS) $(DEFINES) $(INCLUDES) -o $@ $<
clean:
-rm -f *.o

95
contrib/sdk/sources/render/blit.c Normal file
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@ -0,0 +1,95 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "render.h"
#include <kos32sys.h>
void render_blit(struct render *render, enum px_buffer buffer)
{
char proc_info[1024];
EGLContext context;
EGLSurface draw, read;
int winx, winy;
float dst_xscale, dst_yscale;
float *vertices = render->vertices;
float *texcoords = render->texcoords;
int r, b;
if(render == NULL)
return;
get_proc_info(proc_info);
winx = *(uint32_t*)(proc_info+34);
winy = *(uint32_t*)(proc_info+38);
context = eglGetCurrentContext();
draw = eglGetCurrentSurface(EGL_DRAW);
read = eglGetCurrentSurface(EGL_READ);
if (!eglMakeCurrent(render->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, render->context))
{
printf("failed to make window current");
goto err1;
};
glUseProgram(render->blit_prog);
glUniform1i(render->sampler, 0);
glVertexAttribPointer(0, 2, GL_FLOAT,GL_FALSE, 2 * sizeof(float),render->vertices);
glEnableVertexAttribArray(0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, render->tx_buffers[buffer]);
glTexParameteri(GL_TEXTURE_2D,
GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,
GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float),render->texcoords);
glEnableVertexAttribArray(1);
dst_xscale = 1.0/render->scr_width;
dst_yscale = 1.0/render->scr_height;
r = winx + render->dx + render->width ;
b = winy + render->dy + render->height;
float t0, t1, t2, t5;
vertices[0] = t0 = 2*(winx+render->dx)*dst_xscale - 1.0;
vertices[1 * 2] = t2 = 2*r*dst_xscale - 1.0;
vertices[2 * 2] = t2;
vertices[3 * 2] = t0;
vertices[1] = t1 = 2*(winy+render->dy)*dst_yscale - 1.0;
vertices[2*2+1] = t5 = 2*b*dst_yscale - 1.0;
vertices[1*2+1] = t1;
vertices[3*2+1] = t5;
texcoords[0] = 0.0;
texcoords[1] = 0.0;
texcoords[1*2] = 1.0;
texcoords[1*2+1]= 0.0;
texcoords[2*2] = 1.0;
texcoords[2*2+1]= 1.0;
texcoords[3*2] = 0.0;
texcoords[3*2+1]= 1.0;
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glDisable(GL_TEXTURE_2D);
glUseProgram(0);
err1:
eglMakeCurrent(render->dpy, draw, read, context);
}

360
contrib/sdk/sources/render/render.c Normal file
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@ -0,0 +1,360 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "render.h"
#include <i915_drm.h>
#include <kos32sys.h>
static int drm_ioctl(int fd, unsigned long request, void *arg)
{
ioctl_t io;
io.handle = fd;
io.io_code = request;
io.input = arg;
io.inp_size = 64;
io.output = NULL;
io.out_size = 0;
return call_service(&io);
}
static EGLImageKHR px_create_image(EGLDisplay display, EGLContext context,
int width, int height, int stride, int name)
{
EGLImageKHR image;
EGLint attribs[] = {
EGL_WIDTH, 0,
EGL_HEIGHT, 0,
EGL_DRM_BUFFER_STRIDE_MESA, 0,
EGL_DRM_BUFFER_FORMAT_MESA,
EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
EGL_DRM_BUFFER_USE_MESA,
EGL_DRM_BUFFER_USE_SHARE_MESA |
EGL_DRM_BUFFER_USE_SCANOUT_MESA,
EGL_NONE
};
attribs[1] = width;
attribs[3] = height;
attribs[5] = stride/4;
printf("%s w:%d :%d pitch:%d handle %d\n", __FUNCTION__,
width, height, stride, name);
image = eglCreateImageKHR(display, context, EGL_DRM_BUFFER_MESA,
(void *) (uintptr_t)name, attribs);
return image;
}
static GLint create_shader(GLenum type, const char *source)
{
GLint ok;
GLint shader;
shader = glCreateShader(type);
if(shader == 0)
goto err;
glShaderSource(shader, 1, (const GLchar **) &source, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
if (!ok) {
GLchar *info;
GLint size;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &size);
info = malloc(size);
glGetShaderInfoLog(shader, size, NULL, info);
printf("Failed to compile %s: %s\n",
type == GL_FRAGMENT_SHADER ? "FS" : "VS",info);
printf("Program source:\n%s", source);
printf("GLSL compile failure\n");
free(info);
glDeleteProgram(shader);
shader = 0;
}
err:
return shader;
}
struct render* create_render(EGLDisplay dpy, EGLSurface surface, int dx, int dy)
{
const char *vs_src =
"attribute vec4 v_position;\n"
"attribute vec4 v_texcoord0;\n"
"varying vec2 source_texture;\n"
"void main()\n"
"{\n"
" gl_Position = v_position;\n"
" source_texture = v_texcoord0.xy;\n"
"}\n";
const char *fs_src =
// "precision mediump float;\n"
"varying vec2 source_texture;\n"
"uniform sampler2D sampler;\n"
"void main()\n"
"{\n"
" vec3 cg = texture2D(sampler, source_texture).rgb;\n"
" gl_FragColor = vec4(cg.r,cg.g,cg.b,1.0);\n"
"}\n";
EGLint config_attribs[14];
EGLConfig config;
EGLint num_configs;
EGLContext context;
struct drm_i915_fb_info fb;
GLint vs_shader, fs_shader;
GLenum status;
GLint ret;
int fd;
struct render *render;
fd = get_service("DISPLAY");
memset(&fb, 0, sizeof(fb));
ret = drm_ioctl(fd, SRV_FBINFO, &fb);
if( ret != 0 )
{ printf("failed to get framebuffer info\n");
goto err;
};
render = (struct render*)malloc(sizeof(struct render));
if(render == NULL)
goto err;
render->fd = fd;
render->dpy = dpy;
render->dx = dx;
render->dy = dy;
if(!eglQuerySurface(dpy, surface, EGL_WIDTH, &render->width))
goto err1;
if(!eglQuerySurface(dpy, surface, EGL_HEIGHT, &render->height))
goto err1;
render->scr_width = fb.width;
render->scr_height = fb.height;
render->front = eglGetBufferImage(dpy, surface, EGL_DRM_BUFFER_FRONT);
if(render->front == EGL_NO_IMAGE_KHR)
goto err1;
render->back = eglGetBufferImage(dpy, surface, EGL_DRM_BUFFER_BACK);
if( render->back == EGL_NO_IMAGE_KHR)
goto err2;
context = eglGetCurrentContext();
config_attribs[0] = EGL_RED_SIZE;
config_attribs[1] = 1;
config_attribs[2] = EGL_GREEN_SIZE;
config_attribs[3] = 1;
config_attribs[4] = EGL_BLUE_SIZE;
config_attribs[5] = 1;
config_attribs[6] = EGL_DEPTH_SIZE;
config_attribs[7] = 1;
config_attribs[8] = EGL_SURFACE_TYPE;
config_attribs[9] = EGL_WINDOW_BIT;
config_attribs[10] = EGL_RENDERABLE_TYPE;
config_attribs[11] = EGL_OPENGL_BIT;
config_attribs[12] = EGL_NONE;
if (!eglChooseConfig(dpy,config_attribs, &config, 1, &num_configs) || !num_configs)
{
printf("failed to choose a config");
goto err3;
}
render->context = eglCreateContext(dpy, config, EGL_NO_CONTEXT, NULL);
if (!context)
{
printf("failed to create context");
goto err3;
};
if (!eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, render->context))
{
printf("failed to make window current");
goto err4;
};
glGenTextures(2, render->tx_buffers);
if(glGetError() != GL_NO_ERROR)
goto err5;
glBindTexture(GL_TEXTURE_2D, render->tx_buffers[EGL_DRM_BUFFER_FRONT]);
if(glGetError() != GL_NO_ERROR)
goto err6;
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,render->front);
if(glGetError() != GL_NO_ERROR)
goto err6;
glBindTexture(GL_TEXTURE_2D, render->tx_buffers[EGL_DRM_BUFFER_BACK]);
if(glGetError() != GL_NO_ERROR)
goto err6;
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,render->back);
if(glGetError() != GL_NO_ERROR)
goto err6;
glBindTexture(GL_TEXTURE_2D, 0);
render->back_buffer = EGL_DRM_BUFFER_BACK;
render->screen = px_create_image(dpy,context,fb.width,fb.height,
fb.pitch,fb.name);
if(render->screen == EGL_NO_IMAGE_KHR)
goto err6;
glGenTextures(1, &render->tx_screen);
if(glGetError() != GL_NO_ERROR)
goto err6;
glBindTexture(GL_TEXTURE_2D, render->tx_screen);
if(glGetError() != GL_NO_ERROR)
goto err7;
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,render->screen);
if(glGetError() != GL_NO_ERROR)
goto err7;
glBindTexture(GL_TEXTURE_2D, 0);
glGenFramebuffers(1, &render->framebuffer);
if(glGetError() != GL_NO_ERROR)
goto err8;
glBindFramebuffer(GL_FRAMEBUFFER, render->framebuffer);
if(glGetError() != GL_NO_ERROR)
goto err9;
glFramebufferTexture2D(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, render->tx_screen,0);
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
const char *str;
switch (status)
{
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
str = "incomplete attachment";
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
str = "incomplete/missing attachment";
break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
str = "incomplete draw buffer";
break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
str = "incomplete read buffer";
break;
case GL_FRAMEBUFFER_UNSUPPORTED:
str = "unsupported";
break;
case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
str = "incomplete multiple";
break;
default:
str = "unknown error";
break;
}
printf("destination is framebuffer incomplete: %s [%#x]\n", str, status);
goto err9;
}
glViewport(0, 0, render->scr_width, render->scr_height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
render->blit_prog = glCreateProgram();
if(render->blit_prog == 0)
goto err9;
vs_shader = create_shader(GL_VERTEX_SHADER,vs_src);
if(vs_shader == 0)
goto err10;
fs_shader = create_shader(GL_FRAGMENT_SHADER, fs_src);
if(fs_shader == 0)
goto err11;
glAttachShader(render->blit_prog, vs_shader);
glAttachShader(render->blit_prog, fs_shader);
glBindAttribLocation(render->blit_prog, 0, "v_position");
glBindAttribLocation(render->blit_prog, 1, "v_texcoord0");
glLinkProgram(render->blit_prog);
glGetProgramiv(render->blit_prog, GL_LINK_STATUS, &ret);
if (!ret)
{
GLchar *info;
GLint size;
glGetProgramiv(render->blit_prog, GL_INFO_LOG_LENGTH, &size);
info = malloc(size);
glGetProgramInfoLog(render->blit_prog, size, NULL, info);
printf("Failed to link: %s\n", info);
printf("GLSL link failure\n");
free(info);
}
render->sampler = glGetUniformLocation(render->blit_prog,"sampler");
eglMakeCurrent(dpy, surface, surface, context);
return render;
err11:
glDeleteShader(vs_shader);
err10:
glDeleteProgram(render->blit_prog);
err9:
glDeleteFramebuffers(1, &render->framebuffer);
err8:
eglDestroyImageKHR(dpy, render->screen);
err7:
glDeleteTextures(1, &render->tx_screen);
err6:
glDeleteTextures(2, render->tx_buffers);
err5:
eglMakeCurrent(dpy, surface, surface, context);
err4:
eglDestroyContext(dpy, render->context);
err3:
eglDestroyImageKHR(dpy, render->back);
err2:
eglDestroyImageKHR(dpy, render->front);
err1:
free(render);
err:
return NULL;
};

39
contrib/sdk/sources/render/render.h Normal file
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@ -0,0 +1,39 @@
#ifndef __GL_RENDER_H__
#define __GL_RENDER_H__
#define EGL_EGLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#include "EGL/egl.h"
#include "EGL/eglext.h"
#include "GL/gl.h"
enum px_buffer
{
PX_FRONT = 0,
PX_BACK = 1
};
struct render
{
int fd;
EGLDisplay dpy;
EGLContext context;
EGLint dx, dy;
EGLint width, height;
EGLint scr_width, scr_height;
GLuint framebuffer;
EGLImageKHR front, back, screen;
GLuint tx_buffers[2];
GLuint tx_screen;
int back_buffer;
GLuint blit_prog;
GLint sampler;
float vertices[8], texcoords[8];
};
struct render* create_render(EGLDisplay dpy, EGLSurface surface, int dx, int dy);
void render_blit(struct render *render, enum px_buffer buffer);
void render_swap_and_blit(struct render *render);
#endif /* __GL_RENDER_H__ */

100
contrib/sdk/sources/render/swap.c Normal file
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@ -0,0 +1,100 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "render.h"
#include <kos32sys.h>
void render_swap_and_blit(struct render *render)
{
char proc_info[1024];
EGLContext context;
EGLSurface draw, read;
int winx, winy;
float dst_xscale, dst_yscale;
float *vertices = render->vertices;
float *texcoords = render->texcoords;
int r, b;
if(render == NULL)
return;
get_proc_info(proc_info);
winx = *(uint32_t*)(proc_info+34);
winy = *(uint32_t*)(proc_info+38);
context = eglGetCurrentContext();
draw = eglGetCurrentSurface(EGL_DRAW);
read = eglGetCurrentSurface(EGL_READ);
eglSwapBuffers(render->dpy,draw);
if (!eglMakeCurrent(render->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, render->context))
{
printf("failed to make window current");
goto err1;
};
glUseProgram(render->blit_prog);
glUniform1i(render->sampler, 0);
glVertexAttribPointer(0, 2, GL_FLOAT,GL_FALSE, 2 * sizeof(float),render->vertices);
glEnableVertexAttribArray(0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, render->tx_buffers[render->back_buffer]);
glTexParameteri(GL_TEXTURE_2D,
GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,
GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float),render->texcoords);
glEnableVertexAttribArray(1);
dst_xscale = 1.0/render->scr_width;
dst_yscale = 1.0/render->scr_height;
r = winx + render->dx + render->width;
b = winy + render->dy + render->height;
float t0, t1, t2, t5;
vertices[0] = t0 = 2*(winx+render->dx)*dst_xscale - 1.0;
vertices[1 * 2] = t2 = 2*r*dst_xscale - 1.0;
vertices[2 * 2] = t2;
vertices[3 * 2] = t0;
vertices[1] = t1 = 2*(winy+render->dy)*dst_yscale - 1.0;
vertices[2*2+1] = t5 = 2*b*dst_yscale - 1.0;
vertices[1*2+1] = t1;
vertices[3*2+1] = t5;
texcoords[0] = 0.0;
texcoords[1] = 0.0;
texcoords[1*2] = 1.0;
texcoords[1*2+1]= 0.0;
texcoords[2*2] = 1.0;
texcoords[2*2+1]= 1.0;
texcoords[3*2] = 0.0;
texcoords[3*2+1]= 1.0;
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glDisable(GL_TEXTURE_2D);
glUseProgram(0);
render->back_buffer++;
render->back_buffer&=1;
err1:
eglMakeCurrent(render->dpy, draw, read, context);
}