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Add viewport screenshot support to GLES

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This commit is contained in:
ToadKing 2012-10-22 19:03:57 -04:00
parent 0820f36d04
commit 409a482dc5
2 changed files with 43 additions and 1 deletions
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42
gfx/gl.c
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@ -1485,11 +1485,53 @@ static bool gl_read_viewport(void *data, uint8_t *buffer)
glGetIntegerv(GL_VIEWPORT, vp);
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(vp[2]));
#ifdef HAVE_OPENGLES
glReadPixels(vp[0], vp[1],
vp[2], vp[3],
GL_RGB, GL_UNSIGNED_BYTE, buffer);
unsigned numbytes = vp[2] * vp[3];
unsigned count = numbytes / 4;
unsigned remainder = numbytes % 4;
uint32_t *pixels = (uint32_t *)buffer;
// convert RGB to BGR
for (unsigned i = 0; i <= count; pixels += 3, i++)
{
uint8_t p[12];
memcpy(p, pixels, 12);
pixels[0] = p[2] | p[1] << 8 | p[0] << 16 | p[5] << 24;
pixels[1] = p[4] | p[3] << 8 | p[8] << 16 | p[7] << 24;
pixels[2] = p[6] | p[11] << 8 | p[10] << 16 | p[9] << 24;
}
uint8_t *rem = (uint8_t *)pixels;
uint8_t tmp;
switch (remainder)
{
case 3:
tmp = rem[8];
rem[6] = rem[8];
rem[8] = tmp;
case 2:
tmp = rem[5];
rem[3] = rem[5];
rem[5] = tmp;
case 1:
tmp = rem[2];
rem[2] = rem[0];
rem[0] = tmp;
break;
default:
break;
}
#else
glPixelStorei(GL_PACK_ROW_LENGTH, vp[2]);
glReadPixels(vp[0], vp[1],
vp[2], vp[3],
GL_BGR, GL_UNSIGNED_BYTE, buffer);
#endif
return true;
}

2
gfx/gl_common.h
View File

@ -274,7 +274,7 @@ extern PFNGLACTIVETEXTUREPROC pglActiveTexture;
#endif
// Platform specific workarounds/hacks.
#if defined(__CELLOS_LV2__) || defined(HAVE_OPENGLES)
#if defined(__CELLOS_LV2__)
#define NO_GL_READ_VIEWPORT
#endif