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gpu: add comments for TextureCopy

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This commit is contained in:
wwylele 2017-06-29 13:09:23 +03:00
parent bf16c73260
commit 85a448d405
2 changed files with 8 additions and 8 deletions
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14
src/core/hw/gpu.cpp
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@ -334,25 +334,25 @@ static void TextureCopy(const Regs::DisplayTransferConfig& config) {
u32 remaining_size = Common::AlignDown(config.texture_copy.size, 16); u32 remaining_size = Common::AlignDown(config.texture_copy.size, 16);
if (remaining_size == 0) { if (remaining_size == 0) {
// Real hardware freeze on this LOG_CRITICAL(HW_GPU, "zero size. Real hardware freezes on this.");
LOG_CRITICAL(HW_GPU, "zero size");
return; return;
} }
u32 input_gap = config.texture_copy.input_gap * 16; u32 input_gap = config.texture_copy.input_gap * 16;
u32 input_width = input_gap == 0 ? remaining_size : config.texture_copy.input_width * 16;
u32 output_gap = config.texture_copy.output_gap * 16; u32 output_gap = config.texture_copy.output_gap * 16;
// Zero gap means contiguous input/output even if width = 0. To avoid infinite loop below, width
// is assigned with the total size if gap = 0.
u32 input_width = input_gap == 0 ? remaining_size : config.texture_copy.input_width * 16;
u32 output_width = output_gap == 0 ? remaining_size : config.texture_copy.output_width * 16; u32 output_width = output_gap == 0 ? remaining_size : config.texture_copy.output_width * 16;
if (input_width == 0) { if (input_width == 0) {
// Real hardware freeze on this LOG_CRITICAL(HW_GPU, "zero input width. Real hardware freezes on this.");
LOG_CRITICAL(HW_GPU, "zero input width");
return; return;
} }
if (output_width == 0) { if (output_width == 0) {
// Real hardware freeze on this LOG_CRITICAL(HW_GPU, "zero output width. Real hardware freezes on this.");
LOG_CRITICAL(HW_GPU, "zero output width");
return; return;
} }

2
src/core/hw/gpu.h
View file

@ -225,7 +225,7 @@ struct Regs {
INSERT_PADDING_WORDS(0x1); INSERT_PADDING_WORDS(0x1);
struct { struct {
u32 size; u32 size; // The lower 4 bits are ignored
union { union {
u32 input_size; u32 input_size;