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[Vulkan] Prevent negative scissor offsets

This commit is contained in:
DrChat 2018-02-18 15:14:34 -06:00
parent 1a113fb82b
commit 05192e3c0f
1 changed files with 9 additions and 6 deletions
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15
src/xenia/gpu/vulkan/pipeline_cache.cc
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@ -534,16 +534,19 @@ bool PipelineCache::SetDynamicState(VkCommandBuffer command_buffer,
if (scissor_state_dirty) {
int32_t ws_x = regs.pa_sc_window_scissor_tl & 0x7FFF;
int32_t ws_y = (regs.pa_sc_window_scissor_tl >> 16) & 0x7FFF;
uint32_t ws_w = (regs.pa_sc_window_scissor_br & 0x7FFF) - ws_x;
uint32_t ws_h = ((regs.pa_sc_window_scissor_br >> 16) & 0x7FFF) - ws_y;
int32_t ws_w = (regs.pa_sc_window_scissor_br & 0x7FFF) - ws_x;
int32_t ws_h = ((regs.pa_sc_window_scissor_br >> 16) & 0x7FFF) - ws_y;
ws_x += window_offset_x;
ws_y += window_offset_y;
int32_t adj_x = ws_x - std::max(ws_x, 0);
int32_t adj_y = ws_y - std::max(ws_y, 0);
VkRect2D scissor_rect;
scissor_rect.offset.x = ws_x;
scissor_rect.offset.y = ws_y;
scissor_rect.extent.width = ws_w;
scissor_rect.extent.height = ws_h;
scissor_rect.offset.x = ws_x - adj_x;
scissor_rect.offset.y = ws_y - adj_y;
scissor_rect.extent.width = std::max(ws_w + adj_x, 0);
scissor_rect.extent.height = std::max(ws_h + adj_y, 0);
vkCmdSetScissor(command_buffer, 0, 1, &scissor_rect);
}