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EMI: Implement screenshot thumbnails for savegames

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This commit is contained in:
Christian Krause 2014-06-30 22:46:50 +02:00
parent 81745bfe62
commit 1e82136592
18 changed files with 280 additions and 253 deletions
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91
engines/grim/gfx_opengl_shaders.cpp
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@ -1492,38 +1492,6 @@ void GfxOpenGLS::destroyTextObject(TextObject *text) {
delete td;
}
Bitmap *GfxOpenGLS::getScreenshot(int w, int h) {
Graphics::PixelBuffer buffer = Graphics::PixelBuffer::createBuffer<565>(w * h, DisposeAfterUse::YES);
Graphics::PixelBuffer src(Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24), _screenWidth * _screenHeight, DisposeAfterUse::YES);
glReadPixels(0, 0, _screenWidth, _screenHeight, GL_RGBA, GL_UNSIGNED_BYTE, src.getRawBuffer());
int i1 = (_screenWidth * w - 1) / _screenWidth + 1;
int j1 = (_screenHeight * h - 1) / _screenHeight + 1;
for (int j = 0; j < j1; j++) {
for (int i = 0; i < i1; i++) {
int x0 = i * _screenWidth / w;
int x1 = ((i + 1) * _screenWidth - 1) / w + 1;
int y0 = j * _screenHeight / h;
int y1 = ((j + 1) * _screenHeight - 1) / h + 1;
uint32 color = 0;
for (int y = y0; y < y1; y++) {
for (int x = x0; x < x1; x++) {
uint8 lr, lg, lb;
src.getRGBAt(y * _screenWidth + x, lr, lg, lb);
color += (lr + lg + lb) / 3;
}
}
color /= (x1 - x0) * (y1 - y0);
buffer.setPixelAt((h - j - 1) * w + i, color, color, color);
}
}
Bitmap *screenshot = new Bitmap(buffer, w, h, "screenshot");
return screenshot;
}
void GfxOpenGLS::storeDisplay() {
glBindTexture(GL_TEXTURE_2D, _storedDisplay);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _screenWidth, _screenHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
@ -1857,37 +1825,6 @@ void GfxOpenGLS::renderZBitmaps(bool render) {
}
void GfxOpenGLS::createSpecialtyTextures() {
//make a buffer big enough to hold any of the textures
char *buffer = new char[256 * 256 * 4];
glReadPixels(0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[0].create(buffer, 256, 256);
glReadPixels(256, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[1].create(buffer, 256, 256);
glReadPixels(512, 0, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[2].create(buffer, 128, 128);
glReadPixels(512, 128, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[3].create(buffer, 128, 128);
glReadPixels(0, 256, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[4].create(buffer, 256, 256);
glReadPixels(256, 256, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[5].create(buffer, 256, 256);
glReadPixels(512, 256, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[6].create(buffer, 128, 128);
glReadPixels(512, 384, 128, 128, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
_specialty[7].create(buffer, 128, 128);
delete[] buffer;
}
void GfxOpenGLS::createEMIModel(EMIModel *model) {
EMIModelUserData *mud = new EMIModelUserData;
model->_userData = mud;
@ -1977,6 +1914,34 @@ void GfxOpenGLS::destroyMesh(const Mesh *mesh) {
delete mud;
}
static void readPixels(int x, int y, int width, int height, char *buffer) {
char *p = buffer;
for (int i = y; i < y + height; i++) {
glReadPixels(x, 479 - i, width, 1, GL_RGBA, GL_UNSIGNED_BYTE, p);
p += width * 4;
}
}
Bitmap *GfxOpenGLS::getScreenshot(int w, int h, bool useStored) {
Graphics::PixelBuffer src(Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24), _screenWidth * _screenHeight, DisposeAfterUse::YES);
if (useStored) {
glBindTexture(GL_TEXTURE_2D, _storedDisplay);
char *buffer = new char[_screenWidth * _screenHeight * 4];
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
memcpy(src.getRawBuffer(), buffer, _screenWidth * _screenHeight * 4);
delete[] buffer;
} else {
readPixels(0, 0, _screenWidth, _screenHeight, reinterpret_cast<char *>(src.getRawBuffer()));
}
return createScreenshotBitmap(src, w, h, false);
}
void GfxOpenGLS::createSpecialtyTextureFromScreen(unsigned int id, char *data, int x, int y, int width, int height) {
readPixels(x, y, width, height, data);
createSpecialtyTexture(id, data, width, height);
}
}