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[client] add the ability to maintaint the aspect ratio

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This commit is contained in:
Geoffrey McRae 2017-11-28 19:16:47 +11:00
parent 3bc6f29dc3
commit 86cf7a9cf1
1 changed files with 36 additions and 9 deletions
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45
client/main.c
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@ -56,6 +56,7 @@ struct AppState
struct AppParams
{
bool autoResize;
bool keepAspect;
bool borderless;
bool center;
int x, y;
@ -72,6 +73,7 @@ struct AppState state;
struct AppParams params =
{
.autoResize = false,
.keepAspect = true,
.borderless = false,
.center = true,
.x = 0,
@ -281,13 +283,32 @@ int renderThread(void * unused)
break;
}
SDL_Rect dest;
dest.x = 0;
dest.y = 0;
SDL_GetWindowSize(state.window, &dest.w, &dest.h);
if (params.keepAspect)
{
const float texAspect = (float)header.height / (float)header.width;
const float scnAspect = (float)dest.h / (float)dest.w;
if (scnAspect < texAspect)
{
const int w = (float)dest.h / texAspect;
dest.x = (dest.w / 2) - (w / 2);
dest.w = w;
}
else
{
const int h = (float)dest.w * texAspect;
dest.y = (dest.h / 2) - (h / 2);
dest.h = h;
}
}
SDL_RenderClear(state.renderer);
if (state.hasBufferStorage)
{
int w, h;
SDL_GetWindowSize(state.window, &w, &h);
// copy the buffer to the texture and let the guest advance
memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize);
@ -312,11 +333,12 @@ int renderThread(void * unused)
// draw the screen
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, 0.0f); glVertex2i(0, 0);
glTexCoord2f(1.0f, 0.0f); glVertex2i(w, 0);
glTexCoord2f(0.0f, 1.0f); glVertex2i(0, h);
glTexCoord2f(1.0f, 1.0f); glVertex2i(w, h);
glTexCoord2f(0.0f, 0.0f); glVertex2i(dest.x , dest.y );
glTexCoord2f(1.0f, 0.0f); glVertex2i(dest.x + dest.w, dest.y );
glTexCoord2f(0.0f, 1.0f); glVertex2i(dest.x , dest.y + dest.h);
glTexCoord2f(1.0f, 1.0f); glVertex2i(dest.x + dest.w, dest.y + dest.h);
glEnd();
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
@ -338,7 +360,7 @@ int renderThread(void * unused)
memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize);
SDL_UnlockTexture(texture);
SDL_RenderCopy(state.renderer, texture, NULL, NULL);
SDL_RenderCopy(state.renderer, texture, NULL, &dest);
}
SDL_RenderPresent(state.renderer);
@ -772,6 +794,7 @@ void doHelp(char * app)
" -m Enable mipmapping (improves a stretched screen)\n"
"\n"
" -a Auto resize the window to the guest\n"
" -r Don't maintain the aspect ratio\n"
" -d Borderless mode\n"
" -x XPOS Initial window X position [current: %s]\n"
" -y YPOS Initial window Y position [current: %s]\n"
@ -818,7 +841,7 @@ void doLicense()
int main(int argc, char * argv[])
{
int c;
while((c = getopt(argc, argv, "hf:sc:p:gmadx:y:w:b:l")) != -1)
while((c = getopt(argc, argv, "hf:sc:p:gmardx:y:w:b:l")) != -1)
switch(c)
{
case '?':
@ -855,6 +878,10 @@ int main(int argc, char * argv[])
params.autoResize = true;
break;
case 'r':
params.keepAspect = false;
break;
case 'd':
params.borderless = true;
break;