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GPU/HW: Split rectangles on texture page boundaries

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Fixes the sky in Ape Escape's menu screen, FF7 menu borders, probably
others.
This commit is contained in:
Connor McLaughlin 2020-02-17 00:09:31 +09:00
parent bd542831a8
commit bbe54df3a8
1 changed files with 44 additions and 20 deletions
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64
src/core/gpu_hw.cpp
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@ -128,9 +128,7 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
case Primitive::Rectangle:
{
// if we're drawing quads, we need to create a degenerate triangle to restart the triangle strip
const bool restart_strip = !IsFlushed();
if (restart_strip)
AddDuplicateVertex();
bool restart_strip = !IsFlushed();
u32 buffer_pos = 1;
const u32 color = rc.color_for_first_vertex;
@ -140,10 +138,10 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
const auto [texcoord_x, texcoord_y] =
UnpackTexcoord(rc.texture_enable ? Truncate16(command_ptr[buffer_pos++]) : 0);
const u16 tex_left = ZeroExtend16(texcoord_x);
const u16 tex_top = ZeroExtend16(texcoord_y);
u32 rectangle_width;
u32 rectangle_height;
u16 orig_tex_left = ZeroExtend16(texcoord_x);
u16 orig_tex_top = ZeroExtend16(texcoord_y);
s32 rectangle_width;
s32 rectangle_height;
switch (rc.rectangle_size)
{
case DrawRectangleSize::R1x1:
@ -159,28 +157,54 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
rectangle_height = 16;
break;
default:
rectangle_width = command_ptr[buffer_pos] & 0xFFFF;
rectangle_height = command_ptr[buffer_pos] >> 16;
rectangle_width = static_cast<s32>(command_ptr[buffer_pos] & 0xFFFF);
rectangle_height = static_cast<s32>(command_ptr[buffer_pos] >> 16);
break;
}
if (rectangle_width >= MAX_PRIMITIVE_WIDTH || rectangle_height >= MAX_PRIMITIVE_HEIGHT)
return;
max_x = min_x + static_cast<s32>(rectangle_width);
max_y = min_y + static_cast<s32>(rectangle_height);
max_x = min_x + rectangle_width;
max_y = min_y + rectangle_height;
// TODO: This should repeat the texcoords instead of stretching
const u16 tex_right = tex_left + static_cast<u16>(rectangle_width);
const u16 tex_bottom = tex_top + static_cast<u16>(rectangle_height);
// Split the rectangle into multiple quads if it's greater than 256x256, as the texture page should repeat.
u16 tex_top = orig_tex_top;
for (s32 y_offset = 0; y_offset < rectangle_height;)
{
const s32 quad_height = std::min<s32>(rectangle_height - y_offset, TEXTURE_PAGE_WIDTH - tex_top);
const s32 quad_start_y = min_y + y_offset;
const s32 quad_end_y = quad_start_y + quad_height;
const u16 tex_bottom = tex_top + static_cast<u16>(quad_height);
AddVertex(min_x, min_y, color, texpage, tex_left, tex_top);
if (restart_strip)
AddDuplicateVertex();
u16 tex_left = orig_tex_left;
for (s32 x_offset = 0; x_offset < rectangle_width;)
{
const s32 quad_width = std::min<s32>(rectangle_width - x_offset, TEXTURE_PAGE_HEIGHT - tex_left);
const s32 quad_start_x = min_x + x_offset;
const s32 quad_end_x = quad_start_x + quad_width;
const u16 tex_right = tex_left + static_cast<u16>(quad_width);
AddVertex(max_x, min_y, color, texpage, tex_right, tex_top);
AddVertex(min_x, max_y, color, texpage, tex_left, tex_bottom);
AddVertex(max_x, max_y, color, texpage, tex_right, tex_bottom);
if (restart_strip)
AddDuplicateVertex();
AddVertex(quad_start_x, quad_start_y, color, texpage, tex_left, tex_top);
if (restart_strip)
AddDuplicateVertex();
AddVertex(quad_end_x, quad_start_y, color, texpage, tex_right, tex_top);
AddVertex(quad_start_x, quad_end_y, color, texpage, tex_left, tex_bottom);
AddVertex(quad_end_x, quad_end_y, color, texpage, tex_right, tex_bottom);
restart_strip = true;
x_offset += quad_width;
tex_left = 0;
}
y_offset += quad_height;
tex_top = 0;
}
}
break;