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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "engines/stark/gfx/tinyglsurface.h"
#include "engines/stark/gfx/tinyglbitmap.h"
#include "engines/stark/gfx/color.h"
#include "graphics/tinygl/tinygl.h"
namespace Stark {
namespace Gfx {
TinyGLSurfaceRenderer::TinyGLSurfaceRenderer(TinyGLDriver *gfx) :
SurfaceRenderer(),
_gfx(gfx) {
}
TinyGLSurfaceRenderer::~TinyGLSurfaceRenderer() {
}
void TinyGLSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest) {
render(bitmap, dest, bitmap->width(), bitmap->height());
}
void TinyGLSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest, uint width, uint height) {
if (width == 0 || height == 0)
return;
_gfx->start2DMode();
Math::Vector2d sizeWH;
if (_noScalingOverride) {
sizeWH = normalizeCurrentCoordinates(width, height);
} else {
sizeWH = normalizeOriginalCoordinates(width, height);
}
auto verOffsetXY = normalizeOriginalCoordinates(dest.x, dest.y);
auto nativeViewport = _gfx->getViewport();
auto viewport = Math::Vector2d(nativeViewport.width(), nativeViewport.height());
auto blitImage = ((TinyGlBitmap *)const_cast<Bitmap *>(bitmap))->getBlitImage();
int blitImageWidth, blitImageHeight;
tglGetBlitImageSize(blitImage, blitImageWidth, blitImageHeight);
int posX = viewport.getX() * verOffsetXY.getX() + nativeViewport.left;
int posY = viewport.getY() * verOffsetXY.getY() + nativeViewport.top;
TinyGL::BlitTransform transform(posX, posY);
// W/A for not clipped bitmaps in prompt dialog
if (width == 256 && height == 256) {
blitImageHeight = viewport.getY() - dest.y;
blitImageWidth = viewport.getX() - dest.x;
}
transform.sourceRectangle(0, 0, blitImageWidth, blitImageHeight);
transform.tint(1.0, 1.0 - _fadeLevel, 1.0 - _fadeLevel, 1.0 - _fadeLevel);
tglBlit(blitImage, transform);
_gfx->end2DMode();
}
void TinyGLSurfaceRenderer::fill(const Color &color, const Common::Point &dest, uint width, uint height) {
_gfx->start2DMode();
SurfaceVertex vertices[4] = {};
convertToVertices(vertices, dest, width, height);
tglMatrixMode(TGL_PROJECTION);
tglPushMatrix();
tglLoadIdentity();
tglMatrixMode(TGL_MODELVIEW);
tglPushMatrix();
tglLoadIdentity();
tglDisable(TGL_TEXTURE_2D);
tglEnableClientState(TGL_VERTEX_ARRAY);
tglVertexPointer(2, TGL_FLOAT, sizeof(SurfaceVertex), &vertices[0].x);
tglColor4f((color.r / 255.0f) - _fadeLevel, (color.g / 255.0f) - _fadeLevel, (color.b / 255.0f) - _fadeLevel, color.a / 255.0f);
tglDrawArrays(TGL_TRIANGLE_STRIP, 0, 4);
tglDisableClientState(TGL_VERTEX_ARRAY);
tglMatrixMode(TGL_MODELVIEW);
tglPopMatrix();
tglMatrixMode(TGL_PROJECTION);
tglPopMatrix();
_gfx->end2DMode();
}
void TinyGLSurfaceRenderer::convertToVertices(SurfaceVertex *vertices, const Common::Point &dest, uint width, uint height) const {
const Math::Vector2d surfaceVertices[] = {
// X Y
{ 0.0f, 0.0f },
{ 1.0f, 0.0f },
{ 0.0f, 1.0f },
{ 1.0f, 1.0f },
};
Math::Vector2d verSizeWH;
if (_noScalingOverride) {
verSizeWH = normalizeCurrentCoordinates(width, height);
} else {
verSizeWH = normalizeOriginalCoordinates(width, height);
}
auto verOffsetXY = normalizeOriginalCoordinates(dest.x, dest.y);
auto nativeViewport = _gfx->getViewport();
auto viewport = Math::Vector2d(nativeViewport.width(), nativeViewport.height());
for (int32 v = 0; v < 4; v++) {
Math::Vector2d pos = verOffsetXY + (surfaceVertices[v] * verSizeWH);
if (_snapToGrid) {
// Align vertex coordinates to the native pixel grid
// This ensures text does not get garbled by nearest neighbors scaling
pos.setX(floor(pos.getX() * viewport.getX() + 0.5) / viewport.getX());
pos.setY(floor(pos.getY() * viewport.getY() + 0.5) / viewport.getY());
}
// position coords
vertices[v].x = pos.getX() * 2.0 - 1.0;
vertices[v].y = -1.0 * (pos.getY() * 2.0 - 1.0);
}
}
Math::Vector2d TinyGLSurfaceRenderer::normalizeOriginalCoordinates(int x, int y) const {
Common::Rect viewport = _gfx->getUnscaledViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
Math::Vector2d TinyGLSurfaceRenderer::normalizeCurrentCoordinates(int x, int y) const {
Common::Rect viewport = _gfx->getViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
} // End of namespace Gfx
} // End of namespace Stark
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