void OGL14RendererDevice::BackbufferFill(PIXEL color)
{
glPushAttrib(GL_TEXTURE_BIT | GL_ENABLE_BIT | GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT);
const GLfloat vertices[] =
{
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
1.0f, 1.0f,
};
glVertexPointer(2, GL_FLOAT, 0, vertices);
glEnableClientState(GL_VERTEX_ARRAY);
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4ub(PIXEL_GET_R(color), PIXEL_GET_G(color), PIXEL_GET_B(color), PIXEL_GET_A(color));
glPushMatrix();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPopMatrix();
//glEnable(GL_TEXTURE_2D);
glPopAttrib();
}
INLINE void OGL14RendererDevice::DrawRect(f32 x, f32 y, f32 w, f32 h, PIXEL color, BOOL fill) const
{
GLfloat vertices[8];
f32 ratio = ((f32)pScreen->GetHeight() / (f32)pScreen->GetWidth());
f32 fAspectHalfWidth = w / 2.0f;
f32 fAspectHalfHeight = (h * ratio) / 2.0f;
// A
vertices[0] = - fAspectHalfWidth;
vertices[1] = - fAspectHalfHeight;
// B
vertices[2] = + fAspectHalfWidth;
vertices[3] = - fAspectHalfHeight;
if (!fill)
{
// C
vertices[4] = + fAspectHalfWidth;
vertices[5] = + fAspectHalfHeight;
// D
vertices[6] = - fAspectHalfWidth;
vertices[7] = + fAspectHalfHeight;
}
else
{
// C
vertices[4] = - fAspectHalfWidth;
vertices[5] = + fAspectHalfHeight;
// D
vertices[6] = + fAspectHalfWidth;
vertices[7] = + fAspectHalfHeight;
}
glColor4ub(PIXEL_GET_R(color), PIXEL_GET_G(color), PIXEL_GET_B(color), PIXEL_GET_A(color));
glVertexPointer(2, GL_FLOAT, 0, vertices);
glEnableClientState(GL_VERTEX_ARRAY);
f32 nx = fAspectHalfWidth + x;
f32 ny = fAspectHalfHeight + y * ratio;
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glPushMatrix();
glLoadIdentity();
glTranslatef(nx, ny, 0.0f);
if (fill)
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
else
glDrawArrays(GL_LINE_LOOP, 0, 4);
glPopMatrix();
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
}
INLINE void Texture::PutPixel(u32 x, u32 y, PIXEL px)
{
u8 mR = PIXEL_GET_R(px);
u8 mG = PIXEL_GET_G(px);
u8 mB = PIXEL_GET_B(px);
u8 mA = PIXEL_GET_A(px);
image.setPixel(x, y, qRgba(mR, mG, mB, mA));
}
void OGLES1RendererDevice::BackbufferFill(PIXEL color)
{
const GLfloat vertices[] =
{
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
1.0f, 1.0f,
};
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4ub(PIXEL_GET_R(color), PIXEL_GET_G(color), PIXEL_GET_B(color), PIXEL_GET_A(color));
glVertexPointer(2, GL_FLOAT, 0, vertices);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
}
INLINE void OGL14RendererDevice::SetBlendingOperation(eBlendMode mode, PIXEL color) const
{
switch (mode)
{
/* REPLACE */
default:
case BlendNone:
{
// http://home.comcast.net/~tom_forsyth/blog.wiki.html#[[Premultiplied%20alpha]]
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
break;
/* BLEND */
case BlendDefault:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
}
break;
case BlendMerge:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_DST_ALPHA);
}
break;
case BlendScreen:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);
}
break;
/* DECAL */
case BlendDecalOverlay:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glBlendFunc(GL_DST_COLOR, GL_ONE);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
/* MODULATE */
case BlendAdditive:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
case BlendOverlay:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_DST_COLOR, GL_ONE);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
case BlendLighten:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
case BlendColorDodge:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_ONE, GL_ONE);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
case BlendModulateAlpha:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
u8 mA = PIXEL_GET_A(color);
glColor4ub(255, 255, 255, mA);
}
break;
case BlendModulate:
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
u8 mR = PIXEL_GET_R(color);
u8 mG = PIXEL_GET_G(color);
u8 mB = PIXEL_GET_B(color);
u8 mA = PIXEL_GET_A(color);
glColor4ub(mR, mG, mB, mA);
}
break;
}
}
