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[Vulkan] Emulate Xenos behavior with copy dest at a negative offset 

It appears the Xenos starts copying pixel data at the first encountered visible destination pixel, rather than texture mapping the source texture onto the destination polygon
This commit is contained in:
DrChat 2018-04-17 15:35:24 -05:00
parent 0cff91692e
commit 2b66a1b68f
1 changed files with 36 additions and 21 deletions
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57
src/xenia/gpu/vulkan/vulkan_command_processor.cc
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@ -1179,35 +1179,50 @@ bool VulkanCommandProcessor::IssueCopy() {
resolve_extent,
};
// By offsetting the destination texture by the window offset, we've
// already handled it and need to subtract the window offset from the
// destination rectangle.
VkRect2D dst_rect = {
{resolve_offset.x + window_offset_x,
resolve_offset.y + window_offset_y},
{resolve_offset.x, resolve_offset.y},
resolve_extent,
};
// If the destination rectangle lies outside the window, make it start
// inside. The Xenos does not copy pixel data at any offset in screen
// coordinates.
int32_t dst_adj_x =
std::max(dst_rect.offset.x, -window_offset_x) - dst_rect.offset.x;
int32_t dst_adj_y =
std::max(dst_rect.offset.y, -window_offset_y) - dst_rect.offset.y;
if (uint32_t(dst_adj_x) > dst_rect.extent.width ||
uint32_t(dst_adj_y) > dst_rect.extent.height) {
// No-op?
break;
}
dst_rect.offset.x += dst_adj_x;
dst_rect.offset.y += dst_adj_y;
dst_rect.extent.width -= dst_adj_x;
dst_rect.extent.height -= dst_adj_y;
src_rect.extent.width -= dst_adj_x;
src_rect.extent.height -= dst_adj_y;
VkViewport viewport = {
float(-window_offset_x),
float(-window_offset_y),
float(copy_dest_pitch),
float(copy_dest_height),
0.f,
1.f,
0.f, 0.f, float(copy_dest_pitch), float(copy_dest_height), 0.f, 1.f,
};
uint32_t scissor_tl_x = window_regs->window_scissor_tl.tl_x;
uint32_t scissor_br_x = window_regs->window_scissor_br.br_x;
uint32_t scissor_tl_y = window_regs->window_scissor_tl.tl_y;
uint32_t scissor_br_y = window_regs->window_scissor_br.br_y;
// Clamp the values to destination dimensions.
scissor_tl_x = std::min(scissor_tl_x, copy_dest_pitch);
scissor_br_x = std::min(scissor_br_x, copy_dest_pitch);
scissor_tl_y = std::min(scissor_tl_y, copy_dest_height);
scissor_br_y = std::min(scissor_br_y, copy_dest_height);
VkRect2D scissor = {
{
int32_t(window_regs->window_scissor_tl.tl_x.value()),
int32_t(window_regs->window_scissor_tl.tl_y.value()),
},
{
window_regs->window_scissor_br.br_x.value() -
window_regs->window_scissor_tl.tl_x.value(),
window_regs->window_scissor_br.br_y.value() -
window_regs->window_scissor_tl.tl_y.value(),
},
{int32_t(scissor_tl_x), int32_t(scissor_tl_y)},
{scissor_br_x - scissor_tl_x, scissor_br_y - scissor_tl_y},
};
blitter_->BlitTexture2D(