OpenPunk/citra
1
0
Fork 0
mirror of https://github.com/citra-emu/citra.git synced 2024-11-24 08:21:04 +00:00
Code Issues Projects Releases Wiki Activity

Pica/VertexShader: Fixed LOOP with more than one iteration.

Browse Source 
Previously it wouldn't jump back to the start of the loop code once it reached the end of the block.
Fixes the texture problems in a lot of games.
This commit is contained in:
Subv 2015-02-21 12:52:21 -05:00 committed by Darius Goad
parent 3c5aaafb40
commit 404f1ab482
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/video_core/vertex_shader.cpp
View File

@ -90,6 +90,7 @@ struct VertexShaderState {
u8 repeat_counter; // How often to repeat until this call stack element is removed u8 repeat_counter; // How often to repeat until this call stack element is removed
u8 loop_increment; // Which value to add to the loop counter after an iteration u8 loop_increment; // Which value to add to the loop counter after an iteration
// TODO: Should this be a signed value? Does it even matter? // TODO: Should this be a signed value? Does it even matter?
u32 loop_address; // The address where we'll return to after each loop iteration
}; };
// TODO: Is there a maximal size for this? // TODO: Is there a maximal size for this?
@ -115,6 +116,8 @@ static void ProcessShaderCode(VertexShaderState& state) {
if (top.repeat_counter-- == 0) { if (top.repeat_counter-- == 0) {
state.program_counter = &shader_memory[top.return_address]; state.program_counter = &shader_memory[top.return_address];
state.call_stack.pop(); state.call_stack.pop();
} else {
state.program_counter = &shader_memory[top.loop_address];
} }
// TODO: Is "trying again" accurate to hardware? // TODO: Is "trying again" accurate to hardware?
@ -129,7 +132,7 @@ static void ProcessShaderCode(VertexShaderState& state) {
static auto call = [](VertexShaderState& state, u32 offset, u32 num_instructions, static auto call = [](VertexShaderState& state, u32 offset, u32 num_instructions,
u32 return_offset, u8 repeat_count, u8 loop_increment) { u32 return_offset, u8 repeat_count, u8 loop_increment) {
state.program_counter = &shader_memory[offset] - 1; // -1 to make sure when incrementing the PC we end up at the correct offset state.program_counter = &shader_memory[offset] - 1; // -1 to make sure when incrementing the PC we end up at the correct offset
state.call_stack.push({ offset + num_instructions, return_offset, repeat_count, loop_increment }); state.call_stack.push({ offset + num_instructions, return_offset, repeat_count, loop_increment, offset });
}; };
u32 binary_offset = state.program_counter - shader_memory.data(); u32 binary_offset = state.program_counter - shader_memory.data();