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Check unpack align for alpha texture updates, do single texsubimage2d call (thanks Hugh)

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This commit is contained in:
Joshua Granick
2014-02-06 23:41:07 -08:00
parent 43bc6dfe46
commit 55f1cbf94b
1 changed files with 51 additions and 5 deletions
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56
project/src/renderer/opengl/OpenGLTexture.cpp
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@@ -270,21 +270,67 @@ namespace lime {
//mPixelWidth, mPixelHeight);
PixelFormat fmt = inSurface->Format ();
int pw = inSurface->BytesPP ();
GLuint store_format = (fmt == pfAlpha ? GL_ALPHA : GL_RGBA);
glGetError ();
const uint8 *p0 = inSurface->Row (mDirtyRect.y) + (mDirtyRect.x * inSurface->BytesPP ());
int x0 = mDirtyRect.x;
int y0 = mDirtyRect.y;
int dw = mDirtyRect.w;
int dh = mDirtyRect.h;
#if defined(LIME_GLES)
// TODO: pixel transform & copy rect
for (int y = 0; y < mDirtyRect.h; y++) {
uint8 *buffer = 0;
if (pw == 1) {
glTexSubImage2D (GL_TEXTURE_2D, 0, mDirtyRect.x, mDirtyRect.y + y, mDirtyRect.w, 1, store_format, GL_UNSIGNED_BYTE, p0 + (y * inSurface->GetStride ()));
// Make unpack align a multiple of 4 ...
if (inSurface->Width () > 3) {
dw = (dw + 3) & ~3;
if (x0 + dw > inSurface->Width ()) {
x0 = inSurface->Width () - dw;
}
}
const uint8 *p0 = inSurface->Row (y0) + (x0 * pw);
buffer = (uint8 *)malloc (pw * dw * dh);
for (int y = 0; y < dh; y++) {
memcpy (buffer + (y * dw), p0, dw);
p0 += inSurface->GetStride ();
}
} else {
// TODO: pre-alpha ?
buffer = (uint8 *)malloc (pw * dw * dh);
const uint8 *p0 = inSurface->Row (y0) + (x0 * pw);
for (int y = 0; y < mDirtyRect.h; y++) {
memcpy (buffer + (y * dw * pw), p0, dw * pw);
p0 += inSurface->GetStride ();
}
}
glTexSubImage2D (GL_TEXTURE_2D, 0, x0, y0, dw, dh, store_format, GL_UNSIGNED_BYTE, buffer);
free (buffer);
#else
const uint8 *p0 = inSurface->Row (y0) + (x0 * pw);
glPixelStorei (GL_UNPACK_ROW_LENGTH, inSurface->Width ());
glTexSubImage2D (GL_TEXTURE_2D, 0, mDirtyRect.x, mDirtyRect.y, mDirtyRect.w, mDirtyRect.h, store_format, GL_UNSIGNED_BYTE, p0);
glTexSubImage2D (GL_TEXTURE_2D, 0, x0, y0, dw, dh, store_format, GL_UNSIGNED_BYTE, p0);
glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
#endif
int err = glGetError ();