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Make GLES screenshots clearer.

This commit is contained in:
Themaister 2012-10-23 08:37:51 +02:00
parent 12f1eb926d
commit 01569ab8ec
1 changed files with 8 additions and 34 deletions
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42
gfx/gl.c
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@ -1515,47 +1515,21 @@ static bool gl_read_viewport(void *data, uint8_t *buffer)
GLint vp[4]; GLint vp[4];
glGetIntegerv(GL_VIEWPORT, vp); glGetIntegerv(GL_VIEWPORT, vp);
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(vp[2] * 3));
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(vp[2]));
#ifdef HAVE_OPENGLES #ifdef HAVE_OPENGLES
glReadPixels(vp[0], vp[1], glReadPixels(vp[0], vp[1],
vp[2], vp[3], vp[2], vp[3],
GL_RGB, GL_UNSIGNED_BYTE, buffer); GL_RGB, GL_UNSIGNED_BYTE, buffer);
unsigned numbytes = vp[2] * vp[3]; uint8_t *pixels = (uint8_t*)buffer;
unsigned count = numbytes / 4; unsigned num_pixels = vp[2] * vp[3];
unsigned remainder = numbytes % 4; // Convert RGB to BGR. Formats are byte ordered, so just swap 1st and 3rd byte.
uint32_t *pixels = (uint32_t *)buffer; for (unsigned i = 0; i <= num_pixels; pixels += 3, i++)
// convert RGB to BGR
for (unsigned i = 0; i <= count; pixels += 3, i++)
{ {
uint8_t p[12]; uint8_t tmp = pixels[2];
memcpy(p, pixels, 12); pixels[2] = pixels[0];
pixels[0] = p[2] | p[1] << 8 | p[0] << 16 | p[5] << 24; pixels[0] = tmp;
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 #else
glPixelStorei(GL_PACK_ROW_LENGTH, vp[2]); glPixelStorei(GL_PACK_ROW_LENGTH, vp[2]);