void SDLRenderer::impl::drawTexture(TextureID tid, int x, int y)
{
validateTexture(tid);
SDL_Rect dst;
dst.x = x;
dst.y = y;
SDL_QueryTexture(textures[tid], NULL, NULL, &dst.w, &dst.h);
SDL_RenderCopy(ren, textures[tid], NULL, &dst);
}
void SDLRenderer::impl::drawTextureCentered(TextureID tid, int x, int y, int w, int h, double scale)
{
validateTexture(tid);
int textureWidth, textureHeight;
SDL_QueryTexture(textures[tid], NULL, NULL, &textureWidth, &textureHeight);
textureWidth = (int)(textureWidth * scale);
textureHeight = (int)(textureHeight * scale);
SDL_Rect dst;
dst.x = x + (w - textureWidth) / 2;
dst.y = y + (h - textureHeight) / 2;
dst.w = textureWidth;
dst.h = textureHeight;
SDL_RenderCopy(ren, textures[tid], NULL, &dst);
}
void SDLRenderer::impl::drawBackground(TextureID tid)
{
validateTexture(tid);
SDL_RenderCopy(ren, textures[tid], NULL, NULL);
}
void LayerBase::drawWithOpenGL(const Region& clip,
GLint textureName, const GGLSurface& t) const
{
const DisplayHardware& hw(graphicPlane(0).displayHardware());
const uint32_t fbHeight = hw.getHeight();
const State& s(drawingState());
// bind our texture
validateTexture(textureName);
glEnable(GL_TEXTURE_2D);
// Dithering...
if (s.flags & ISurfaceComposer::eLayerDither) {
glEnable(GL_DITHER);
} else {
glDisable(GL_DITHER);
}
if (UNLIKELY(s.alpha < 0xFF)) {
// We have an alpha-modulation. We need to modulate all
// texture components by alpha because we're always using
// premultiplied alpha.
// If the texture doesn't have an alpha channel we can
// use REPLACE and switch to non premultiplied alpha
// blending (SRCA/ONE_MINUS_SRCA).
GLenum env, src;
if (needsBlending()) {
env = GL_MODULATE;
src = mPremultipliedAlpha ? GL_ONE : GL_SRC_ALPHA;
} else {
env = GL_REPLACE;
src = GL_SRC_ALPHA;
}
const GGLfixed alpha = (s.alpha << 16)/255;
glColor4x(alpha, alpha, alpha, alpha);
glEnable(GL_BLEND);
glBlendFunc(src, GL_ONE_MINUS_SRC_ALPHA);
glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, env);
} else {
glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glColor4x(0x10000, 0x10000, 0x10000, 0x10000);
if (needsBlending()) {
GLenum src = mPremultipliedAlpha ? GL_ONE : GL_SRC_ALPHA;
glEnable(GL_BLEND);
glBlendFunc(src, GL_ONE_MINUS_SRC_ALPHA);
} else {
glDisable(GL_BLEND);
}
}
if (UNLIKELY(transformed()
|| !(mFlags & DisplayHardware::DRAW_TEXTURE_EXTENSION) ))
{
//StopWatch watch("GL transformed");
Region::iterator iterator(clip);
if (iterator) {
// always use high-quality filtering with fast configurations
bool fast = !(mFlags & DisplayHardware::SLOW_CONFIG);
if (!fast && s.flags & ISurfaceComposer::eLayerFilter) {
glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
const GLfixed texCoords[4][2] = {
{ 0, 0 },
{ 0, 0x10000 },
{ 0x10000, 0x10000 },
{ 0x10000, 0 }
};
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
if (!(mFlags & DisplayHardware::NPOT_EXTENSION)) {
// find the smallest power-of-two that will accommodate our surface
GLuint tw = 1 << (31 - clz(t.width));
GLuint th = 1 << (31 - clz(t.height));
if (tw < t.width) tw <<= 1;
if (th < t.height) th <<= 1;
// this divide should be relatively fast because it's
// a power-of-two (optimized path in libgcc)
GLfloat ws = GLfloat(t.width) /tw;
GLfloat hs = GLfloat(t.height)/th;
glScalef(ws, hs, 1.0f);
}
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(2, GL_FIXED, 0, mVertices);
glTexCoordPointer(2, GL_FIXED, 0, texCoords);
Rect r;
while (iterator.iterate(&r)) {
const GLint sy = fbHeight - (r.top + r.height());
glScissor(r.left, sy, r.width(), r.height());
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
if (!fast && s.flags & ISurfaceComposer::eLayerFilter) {
glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
} else {
Region::iterator iterator(clip);
if (iterator) {
Rect r;
GLint crop[4] = { 0, t.height, t.width, -t.height };
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
int x = tx();
int y = ty();
y = fbHeight - (y + t.height);
while (iterator.iterate(&r)) {
const GLint sy = fbHeight - (r.top + r.height());
glScissor(r.left, sy, r.width(), r.height());
glDrawTexiOES(x, y, 0, t.width, t.height);
}
}
}
}
