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[client] egl: fix usage `destRect, 0x0 is top left

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This fixes the letterbox clip being incorrect when rounding is occuring
due to the inverted coordinate space.
This commit is contained in:
Geoffrey McRae 2022-09-17 15:12:09 +10:00
parent f5e68711d0
commit 0149549251
1 changed files with 12 additions and 7 deletions
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19
client/renderers/EGL/egl.c
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@ -455,8 +455,8 @@ static void egl_onResize(LG_Renderer * renderer, const int width, const int heig
if (destRect.valid)
{
this->translateX = 1.0f - (((this->destRect.w / 2) + this->destRect.x) * 2) / (float)this->width;
this->translateY = 1.0f - (((this->destRect.h / 2) + this->destRect.y) * 2) / (float)this->height;
this->translateX = -1.0f + (((this->destRect.w / 2) + this->destRect.x) * 2) / (float)this->width;
this->translateY = 1.0f - (((this->destRect.h / 2) + this->destRect.y) * 2) / (float)this->height;
this->scaleX = (float)this->destRect.w / (float)this->width;
this->scaleY = (float)this->destRect.h / (float)this->height;
this->viewportWidth = this->destRect.w;
@ -962,21 +962,26 @@ inline static void renderLetterBox(struct Inst * this)
if (hLB)
{
glScissor(0.0f, 0.0f, this->destRect.x + 0.5f, this->height + 0.5f);
// left
glScissor(0, 0, this->destRect.x, this->height);
glClear(GL_COLOR_BUFFER_BIT);
// right
float x2 = this->destRect.x + this->destRect.w;
glScissor(x2 - 0.5f, 0.0f, this->width - x2 + 1.0f, this->height + 1.0f);
glScissor(x2, 0, this->width - x2, this->height);
glClear(GL_COLOR_BUFFER_BIT);
}
if (vLB)
{
glScissor(0.0f, 0.0f, this->width + 0.5f, this->destRect.y + 0.5f);
// top
glScissor(0, this->height - this->destRect.y,
this->width, this->destRect.y);
glClear(GL_COLOR_BUFFER_BIT);
float y2 = this->destRect.y + this->destRect.h;
glScissor(0.0f, y2 - 0.5f, this->width + 1.0f, this->height - y2 + 1.0f);
// bottom
int y2 = this->destRect.y + this->destRect.h;
glScissor(0, 0, this->width, this->height - y2);
glClear(GL_COLOR_BUFFER_BIT);
}