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vk_rasterizer: Flip viewport on Y_NEGATE 

Matches OpenGL's behavior. I don't believe this register flips geometry,
but we have to try to match behavior on both backends.
This commit is contained in:
ReinUsesLisp 2021-07-29 02:17:53 -03:00
parent 124e3b4819
commit b185567a03
1 changed files with 7 additions and 2 deletions
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9
src/video_core/renderer_vulkan/vk_rasterizer.cpp
View File

@ -61,11 +61,16 @@ struct DrawParams {
VkViewport GetViewportState(const Device& device, const Maxwell& regs, size_t index) {
const auto& src = regs.viewport_transform[index];
const float width = src.scale_x * 2.0f;
const float height = src.scale_y * 2.0f;
float y = src.translate_y - src.scale_y;
float height = src.scale_y * 2.0f;
if (regs.screen_y_control.y_negate) {
y += height;
height = -height;
}
const float reduce_z = regs.depth_mode == Maxwell::DepthMode::MinusOneToOne ? 1.0f : 0.0f;
VkViewport viewport{
.x = src.translate_x - src.scale_x,
.y = src.translate_y - src.scale_y,
.y = y,
.width = width != 0.0f ? width : 1.0f,
.height = height != 0.0f ? height : 1.0f,
.minDepth = src.translate_z - src.scale_z * reduce_z,