void FGLRenderer::DrawTexture(FTexture *img, DCanvas::DrawParms &parms)
{
double xscale = parms.destwidth / parms.texwidth;
double yscale = parms.destheight / parms.texheight;
double x = parms.x - parms.left * xscale;
double y = parms.y - parms.top * yscale;
double w = parms.destwidth;
double h = parms.destheight;
float u1, v1, u2, v2, r, g, b;
float light = 1.f;
FMaterial * gltex = FMaterial::ValidateTexture(img);
const PatchTextureInfo * pti;
if (parms.colorOverlay)
{
// Right now there's only black. Should be implemented properly later
light = 1.f - APART(parms.colorOverlay)/255.f;
}
if (!img->bHasCanvas)
{
if (!parms.alphaChannel)
{
int translation = 0;
if (parms.remap != NULL && !parms.remap->Inactive)
{
GLTranslationPalette * pal = static_cast<GLTranslationPalette*>(parms.remap->GetNative());
if (pal) translation = -pal->GetIndex();
}
pti = gltex->BindPatch(CM_DEFAULT, translation);
}
else
{
// This is an alpha texture
pti = gltex->BindPatch(CM_SHADE, 0);
}
if (!pti) return;
u1 = pti->GetUL();
v1 = pti->GetVT();
u2 = pti->GetUR();
v2 = pti->GetVB();
}
else
{
gltex->Bind(CM_DEFAULT, 0, 0);
u2=1.f;
v2=-1.f;
u1 = v1 = 0.f;
gl_RenderState.SetTextureMode(TM_OPAQUE);
}
if (parms.flipX)
{
float temp = u1;
u1 = u2;
u2 = temp;
}
if (parms.windowleft > 0 || parms.windowright < parms.texwidth)
{
x += parms.windowleft * xscale;
w -= (parms.texwidth - parms.windowright + parms.windowleft) * xscale;
u1 = float(u1 + parms.windowleft / parms.texwidth);
u2 = float(u2 - (parms.texwidth - parms.windowright) / parms.texwidth);
}
if (parms.style.Flags & STYLEF_ColorIsFixed)
{
r = RPART(parms.fillcolor)/255.0f;
g = GPART(parms.fillcolor)/255.0f;
b = BPART(parms.fillcolor)/255.0f;
}
else
{
r = g = b = light;
}
// scissor test doesn't use the current viewport for the coordinates, so use real screen coordinates
int btm = (SCREENHEIGHT - screen->GetHeight()) / 2;
btm = SCREENHEIGHT - btm;
gl.Enable(GL_SCISSOR_TEST);
int space = (static_cast<OpenGLFrameBuffer*>(screen)->GetTrueHeight()-screen->GetHeight())/2;
gl.Scissor(parms.lclip, btm - parms.dclip + space, parms.rclip - parms.lclip, parms.dclip - parms.uclip);
gl_SetRenderStyle(parms.style, !parms.masked, false);
if (img->bHasCanvas)
{
gl_RenderState.SetTextureMode(TM_OPAQUE);
}
gl.Color4f(r, g, b, FIXED2FLOAT(parms.alpha));
gl_RenderState.EnableAlphaTest(false);
gl_RenderState.Apply();
gl.Begin(GL_TRIANGLE_STRIP);
gl.TexCoord2f(u1, v1);
glVertex2d(x, y);
gl.TexCoord2f(u1, v2);
glVertex2d(x, y + h);
gl.TexCoord2f(u2, v1);
glVertex2d(x + w, y);
gl.TexCoord2f(u2, v2);
glVertex2d(x + w, y + h);
gl.End();
gl_RenderState.EnableAlphaTest(true);
gl.Scissor(0, 0, screen->GetWidth(), screen->GetHeight());
gl.Disable(GL_SCISSOR_TEST);
gl_RenderState.SetTextureMode(TM_MODULATE);
gl_RenderState.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl_RenderState.BlendEquation(GL_FUNC_ADD);
}
void FGLRenderer::DrawTexture(FTexture *img, DrawParms &parms)
{
double xscale = parms.destwidth / parms.texwidth;
double yscale = parms.destheight / parms.texheight;
double x = parms.x - parms.left * xscale;
double y = parms.y - parms.top * yscale;
double w = parms.destwidth;
double h = parms.destheight;
float u1, v1, u2, v2;
int light = 255;
FMaterial * gltex = FMaterial::ValidateTexture(img, false);
if (parms.colorOverlay && (parms.colorOverlay & 0xffffff) == 0)
{
// Right now there's only black. Should be implemented properly later
light = 255 - APART(parms.colorOverlay);
parms.colorOverlay = 0;
}
gl_SetRenderStyle(parms.style, !parms.masked, false);
if (!img->bHasCanvas)
{
int translation = 0;
if (!parms.alphaChannel)
{
if (parms.remap != NULL && !parms.remap->Inactive)
{
GLTranslationPalette * pal = static_cast<GLTranslationPalette*>(parms.remap->GetNative());
if (pal) translation = -pal->GetIndex();
}
}
gl_RenderState.SetMaterial(gltex, CLAMP_XY_NOMIP, translation, -1, !!(parms.style.Flags & STYLEF_RedIsAlpha));
u1 = gltex->GetUL();
v1 = gltex->GetVT();
u2 = gltex->GetUR();
v2 = gltex->GetVB();
}
else
{
gl_RenderState.SetMaterial(gltex, CLAMP_XY_NOMIP, 0, -1, false);
u1 = 0.f;
v1 = 1.f;
u2 = 1.f;
v2 = 0.f;
gl_RenderState.SetTextureMode(TM_OPAQUE);
}
if (parms.flipX)
{
float temp = u1;
u1 = u2;
u2 = temp;
}
if (parms.windowleft > 0 || parms.windowright < parms.texwidth)
{
double wi = MIN(parms.windowright, parms.texwidth);
x += parms.windowleft * xscale;
w -= (parms.texwidth - wi + parms.windowleft) * xscale;
u1 = float(u1 + parms.windowleft / parms.texwidth);
u2 = float(u2 - (parms.texwidth - wi) / parms.texwidth);
}
PalEntry color;
if (parms.style.Flags & STYLEF_ColorIsFixed)
{
color = parms.fillcolor;
}
else
{
color = PalEntry(light, light, light);
}
color.a = (BYTE)(parms.Alpha * 255);
// scissor test doesn't use the current viewport for the coordinates, so use real screen coordinates
int btm = (SCREENHEIGHT - screen->GetHeight()) / 2;
btm = SCREENHEIGHT - btm;
glEnable(GL_SCISSOR_TEST);
int space = (static_cast<OpenGLFrameBuffer*>(screen)->GetTrueHeight()-screen->GetHeight())/2;
glScissor(parms.lclip, btm - parms.dclip + space, parms.rclip - parms.lclip, parms.dclip - parms.uclip);
gl_RenderState.SetColor(color);
gl_RenderState.AlphaFunc(GL_GEQUAL, 0.f);
gl_RenderState.Apply();
FFlatVertex *ptr = GLRenderer->mVBO->GetBuffer();
ptr->Set(x, y, 0, u1, v1); ptr++;
ptr->Set(x, y + h, 0, u1, v2); ptr++;
ptr->Set(x + w, y, 0, u2, v1); ptr++;
ptr->Set(x + w, y + h, 0, u2, v2); ptr++;
GLRenderer->mVBO->RenderCurrent(ptr, GL_TRIANGLE_STRIP);
if (parms.colorOverlay)
{
gl_RenderState.SetTextureMode(TM_MASK);
gl_RenderState.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl_RenderState.BlendEquation(GL_FUNC_ADD);
gl_RenderState.SetColor(PalEntry(parms.colorOverlay));
gl_RenderState.Apply();
FFlatVertex *ptr = GLRenderer->mVBO->GetBuffer();
ptr->Set(x, y, 0, u1, v1); ptr++;
ptr->Set(x, y + h, 0, u1, v2); ptr++;
ptr->Set(x + w, y, 0, u2, v1); ptr++;
ptr->Set(x + w, y + h, 0, u2, v2); ptr++;
GLRenderer->mVBO->RenderCurrent(ptr, GL_TRIANGLE_STRIP);
}
glScissor(0, 0, screen->GetWidth(), screen->GetHeight());
glDisable(GL_SCISSOR_TEST);
gl_RenderState.SetTextureMode(TM_MODULATE);
gl_RenderState.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl_RenderState.BlendEquation(GL_FUNC_ADD);
}
