void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
if (OpenGL::oes_draw_texture) {
DrawFlippedOES(dest, src);
return;
}
#endif
const RasterPoint vertices[] = {
dest.GetTopLeft(),
dest.GetTopRight(),
dest.GetBottomLeft(),
dest.GetBottomRight(),
};
const ScopeVertexPointer vp(vertices);
const PixelSize allocated = GetAllocatedSize();
GLfloat x0 = (GLfloat)src.left / allocated.cx;
GLfloat y0 = (GLfloat)src.top / allocated.cy;
GLfloat x1 = (GLfloat)src.right / allocated.cx;
GLfloat y1 = (GLfloat)src.bottom / allocated.cy;
const GLfloat coord[] = {
x0, y1,
x1, y1,
x0, y0,
x1, y0,
};
#ifdef USE_GLSL
glEnableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
glVertexAttribPointer(OpenGL::Attribute::TEXCOORD, 2, GL_FLOAT, GL_FALSE,
0, coord);
#else
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, coord);
#endif
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
#ifdef USE_GLSL
glDisableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
OpenGL::solid_shader->Use();
#else
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#endif
}
void
DrawVerticalGradient(Canvas &canvas, const PixelRect &rc,
Color top_color, Color bottom_color, Color fallback_color)
{
#if defined(EYE_CANDY) && defined(ENABLE_OPENGL)
const RasterPoint vertices[] = {
rc.GetTopLeft(),
rc.GetTopRight(),
rc.GetBottomLeft(),
rc.GetBottomRight(),
};
glVertexPointer(2, GL_VALUE, 0, vertices);
const Color colors[] = {
top_color,
top_color,
bottom_color,
bottom_color,
};
glEnableClientState(GL_COLOR_ARRAY);
#ifdef HAVE_GLES
glColorPointer(4, GL_FIXED, 0, colors);
#else
glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
#endif
static_assert(ARRAY_SIZE(vertices) == ARRAY_SIZE(colors),
"Array size mismatch");
glDrawArrays(GL_TRIANGLE_STRIP, 0, ARRAY_SIZE(vertices));
glDisableClientState(GL_COLOR_ARRAY);
#else
canvas.DrawFilledRectangle(rc, fallback_color);
#endif
}
void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
if (OpenGL::oes_draw_texture) {
DrawFlippedOES(dest, src);
return;
}
#endif
const RasterPoint vertices[] = {
dest.GetTopLeft(),
dest.GetTopRight(),
dest.GetBottomLeft(),
dest.GetBottomRight(),
};
glVertexPointer(2, GL_VALUE, 0, vertices);
const PixelSize allocated = GetAllocatedSize();
GLfloat x0 = (GLfloat)src.left / allocated.cx;
GLfloat y0 = (GLfloat)src.top / allocated.cy;
GLfloat x1 = (GLfloat)src.right / allocated.cx;
GLfloat y1 = (GLfloat)src.bottom / allocated.cy;
const GLfloat coord[] = {
x0, y1,
x1, y1,
x0, y0,
x1, y0,
};
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, coord);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}