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Add font LCD sub-pixel anti-aliasing support.

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This commit is contained in:
bruvzg
2022-08-12 14:03:28 +03:00
parent 230225d360
commit bcc3643989
49 changed files with 933 additions and 303 deletions
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155
drivers/gles3/rasterizer_canvas_gles3.cpp
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@@ -322,6 +322,7 @@ void RasterizerCanvasGLES3::_render_items(RID p_to_render_target, int p_item_cou
RID prev_material;
uint32_t index = 0;
GLES3::CanvasShaderData::BlendMode last_blend_mode = GLES3::CanvasShaderData::BLEND_MODE_MIX;
Color last_blend_color;
GLES3::CanvasShaderData *shader_data_cache = nullptr;
state.current_tex = texture_storage->texture_gl_get_default(GLES3::DEFAULT_GL_TEXTURE_WHITE);
@@ -378,75 +379,13 @@ void RasterizerCanvasGLES3::_render_items(RID p_to_render_target, int p_item_cou
GLES3::CanvasShaderData::BlendMode blend_mode = shader_data_cache ? shader_data_cache->blend_mode : GLES3::CanvasShaderData::BLEND_MODE_MIX;
if (last_blend_mode != blend_mode) {
if (last_blend_mode == GLES3::CanvasShaderData::BLEND_MODE_DISABLED) {
// re-enable it
glEnable(GL_BLEND);
} else if (blend_mode == GLES3::CanvasShaderData::BLEND_MODE_DISABLED) {
// disable it
glDisable(GL_BLEND);
}
switch (blend_mode) {
case GLES3::CanvasShaderData::BLEND_MODE_DISABLED: {
// Nothing to do here.
} break;
case GLES3::CanvasShaderData::BLEND_MODE_MIX: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_ADD: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_SRC_ALPHA, GL_ONE);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_SUB: {
glBlendEquation(GL_FUNC_REVERSE_SUBTRACT);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_SRC_ALPHA, GL_ONE);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_MUL: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_DST_COLOR, GL_ZERO, GL_DST_ALPHA, GL_ZERO);
} else {
glBlendFuncSeparate(GL_DST_COLOR, GL_ZERO, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_PMALPHA: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE);
}
} break;
}
last_blend_mode = blend_mode;
}
_render_item(p_to_render_target, ci, canvas_transform_inverse, current_clip, p_lights, index);
_render_item(p_to_render_target, ci, canvas_transform_inverse, current_clip, p_lights, index, blend_mode, last_blend_mode, last_blend_color);
}
// Render last command
_render_batch(index);
}
void RasterizerCanvasGLES3::_render_item(RID p_render_target, const Item *p_item, const Transform2D &p_canvas_transform_inverse, Item *&current_clip, Light *p_lights, uint32_t &r_index) {
void RasterizerCanvasGLES3::_render_item(RID p_render_target, const Item *p_item, const Transform2D &p_canvas_transform_inverse, Item *&current_clip, Light *p_lights, uint32_t &r_index, GLES3::CanvasShaderData::BlendMode p_blend_mode, GLES3::CanvasShaderData::BlendMode &r_last_blend_mode, Color &r_last_blend_color) {
// Used by Polygon and Mesh.
static const GLenum prim[5] = { GL_POINTS, GL_LINES, GL_LINE_STRIP, GL_TRIANGLES, GL_TRIANGLE_STRIP };
@@ -499,6 +438,92 @@ void RasterizerCanvasGLES3::_render_item(RID p_render_target, const Item *p_item
state.instance_data_array[r_index].flags = base_flags | (state.instance_data_array[r_index == 0 ? 0 : r_index - 1].flags & (FLAGS_DEFAULT_NORMAL_MAP_USED | FLAGS_DEFAULT_SPECULAR_MAP_USED)); //reset on each command for sanity, keep canvastexture binding config
GLES3::CanvasShaderData::BlendMode blend_mode = p_blend_mode;
Color blend_color;
if (c->type == Item::Command::TYPE_RECT) {
const Item::CommandRect *rect = static_cast<const Item::CommandRect *>(c);
if (rect->flags & CANVAS_RECT_LCD) {
blend_mode = GLES3::CanvasShaderData::BLEND_MODE_LCD;
blend_color = rect->modulate;
}
}
if (r_last_blend_mode != blend_mode || r_last_blend_color != blend_color) {
_render_batch(r_index);
if (r_last_blend_mode == GLES3::CanvasShaderData::BLEND_MODE_DISABLED) {
// re-enable it
glEnable(GL_BLEND);
} else if (blend_mode == GLES3::CanvasShaderData::BLEND_MODE_DISABLED) {
// disable it
glDisable(GL_BLEND);
}
switch (blend_mode) {
case GLES3::CanvasShaderData::BLEND_MODE_DISABLED: {
// Nothing to do here.
} break;
case GLES3::CanvasShaderData::BLEND_MODE_LCD: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_CONSTANT_COLOR, GL_ONE_MINUS_SRC_COLOR, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glBlendFuncSeparate(GL_CONSTANT_COLOR, GL_ONE_MINUS_SRC_COLOR, GL_ZERO, GL_ONE);
}
glBlendColor(blend_color.r, blend_color.g, blend_color.b, blend_color.a);
} break;
case GLES3::CanvasShaderData::BLEND_MODE_MIX: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_ADD: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_SRC_ALPHA, GL_ONE);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_SUB: {
glBlendEquation(GL_FUNC_REVERSE_SUBTRACT);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_SRC_ALPHA, GL_ONE);
} else {
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_MUL: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_DST_COLOR, GL_ZERO, GL_DST_ALPHA, GL_ZERO);
} else {
glBlendFuncSeparate(GL_DST_COLOR, GL_ZERO, GL_ZERO, GL_ONE);
}
} break;
case GLES3::CanvasShaderData::BLEND_MODE_PMALPHA: {
glBlendEquation(GL_FUNC_ADD);
if (state.transparent_render_target) {
glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE);
}
} break;
}
r_last_blend_mode = blend_mode;
r_last_blend_color = blend_color;
}
switch (c->type) {
case Item::Command::TYPE_RECT: {
const Item::CommandRect *rect = static_cast<const Item::CommandRect *>(c);
@@ -569,6 +594,8 @@ void RasterizerCanvasGLES3::_render_item(RID p_render_target, const Item *p_item
state.instance_data_array[r_index].msdf[1] = rect->outline; // Outline size.
state.instance_data_array[r_index].msdf[2] = 0.f; // Reserved.
state.instance_data_array[r_index].msdf[3] = 0.f; // Reserved.
} else if (rect->flags & CANVAS_RECT_LCD) {
state.instance_data_array[r_index].flags |= FLAGS_USE_LCD;
}
state.instance_data_array[r_index].modulation[0] = rect->modulate.r * base_color.r;