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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 struct AppParams
{ {
bool autoResize; bool autoResize;
bool keepAspect;
bool borderless; bool borderless;
bool center; bool center;
int x, y; int x, y;
@ -72,6 +73,7 @@ struct AppState state;
struct AppParams params = struct AppParams params =
{ {
.autoResize = false, .autoResize = false,
.keepAspect = true,
.borderless = false, .borderless = false,
.center = true, .center = true,
.x = 0, .x = 0,
@ -281,13 +283,32 @@ int renderThread(void * unused)
break; 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); SDL_RenderClear(state.renderer);
if (state.hasBufferStorage) if (state.hasBufferStorage)
{ {
int w, h;
SDL_GetWindowSize(state.window, &w, &h);
// copy the buffer to the texture and let the guest advance // copy the buffer to the texture and let the guest advance
memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize); memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize);
@ -312,11 +333,12 @@ int renderThread(void * unused)
// draw the screen // draw the screen
glBegin(GL_TRIANGLE_STRIP); glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, 0.0f); glVertex2i(0, 0); glTexCoord2f(0.0f, 0.0f); glVertex2i(dest.x , dest.y );
glTexCoord2f(1.0f, 0.0f); glVertex2i(w, 0); glTexCoord2f(1.0f, 0.0f); glVertex2i(dest.x + dest.w, dest.y );
glTexCoord2f(0.0f, 1.0f); glVertex2i(0, h); glTexCoord2f(0.0f, 1.0f); glVertex2i(dest.x , dest.y + dest.h);
glTexCoord2f(1.0f, 1.0f); glVertex2i(w, h); glTexCoord2f(1.0f, 1.0f); glVertex2i(dest.x + dest.w, dest.y + dest.h);
glEnd(); glEnd();
glBindTexture(GL_TEXTURE_2D, 0); glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D); glDisable(GL_TEXTURE_2D);
@ -338,7 +360,7 @@ int renderThread(void * unused)
memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize); memcpySSE(texPixels[texIndex], pixels + newHeader.dataPos, texSize);
SDL_UnlockTexture(texture); SDL_UnlockTexture(texture);
SDL_RenderCopy(state.renderer, texture, NULL, NULL); SDL_RenderCopy(state.renderer, texture, NULL, &dest);
} }
SDL_RenderPresent(state.renderer); SDL_RenderPresent(state.renderer);
@ -772,6 +794,7 @@ void doHelp(char * app)
" -m Enable mipmapping (improves a stretched screen)\n" " -m Enable mipmapping (improves a stretched screen)\n"
"\n" "\n"
" -a Auto resize the window to the guest\n" " -a Auto resize the window to the guest\n"
" -r Don't maintain the aspect ratio\n"
" -d Borderless mode\n" " -d Borderless mode\n"
" -x XPOS Initial window X position [current: %s]\n" " -x XPOS Initial window X position [current: %s]\n"
" -y YPOS Initial window Y 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 main(int argc, char * argv[])
{ {
int c; 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) switch(c)
{ {
case '?': case '?':
@ -855,6 +878,10 @@ int main(int argc, char * argv[])
params.autoResize = true; params.autoResize = true;
break; break;
case 'r':
params.keepAspect = false;
break;
case 'd': case 'd':
params.borderless = true; params.borderless = true;
break; break;