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217 lines
7.0 KiB
C++
217 lines
7.0 KiB
C++
#pragma once
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// "Immediate mode"-lookalike buffered drawing. Very fast way to draw 2D.
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#include <vector>
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#include <cstdint>
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#include "Common/Data/Color/RGBAUtil.h"
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#include "Common/Render/TextureAtlas.h"
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#include "Common/Math/geom2d.h"
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#include "Common/Math/lin/matrix4x4.h"
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#include "Common/GPU/thin3d.h"
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struct Atlas;
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enum {
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// Enough?
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MAX_VERTS = 65536,
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};
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enum {
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ALIGN_LEFT = 0,
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ALIGN_RIGHT = 16,
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ALIGN_TOP = 0,
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ALIGN_BOTTOM = 1,
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ALIGN_HCENTER = 4,
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ALIGN_VCENTER = 8,
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ALIGN_VBASELINE = 32, // text only, possibly not yet working
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ALIGN_CENTER = ALIGN_HCENTER | ALIGN_VCENTER,
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ALIGN_TOPLEFT = ALIGN_TOP | ALIGN_LEFT,
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ALIGN_TOPRIGHT = ALIGN_TOP | ALIGN_RIGHT,
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ALIGN_BOTTOMLEFT = ALIGN_BOTTOM | ALIGN_LEFT,
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ALIGN_BOTTOMRIGHT = ALIGN_BOTTOM | ALIGN_RIGHT,
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// Only for text drawing
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ROTATE_90DEG_LEFT = 256,
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ROTATE_90DEG_RIGHT = 512,
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ROTATE_180DEG = 1024,
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// For "uncachable" text like debug log.
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// Avoids using system font drawing as it's too slow.
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// Not actually used here but is reserved for whatever system wraps DrawBuffer.
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FLAG_DYNAMIC_ASCII = 2048,
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FLAG_NO_PREFIX = 4096, // means to not process ampersands
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FLAG_WRAP_TEXT = 8192,
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FLAG_ELLIPSIZE_TEXT = 16384,
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};
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namespace Draw {
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class Pipeline;
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}
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struct GradientStop {
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float t;
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uint32_t color;
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};
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class TextDrawer;
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class DrawBuffer {
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public:
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DrawBuffer();
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~DrawBuffer();
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void Begin(Draw::Pipeline *pipeline);
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void Flush(bool set_blend_state = true);
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// TODO: Enforce these. Now Init is autocalled and shutdown not called.
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void Init(Draw::DrawContext *t3d, Draw::Pipeline *pipeline);
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void Shutdown();
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// So that callers can create appropriate pipelines.
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Draw::InputLayout *CreateInputLayout(Draw::DrawContext *t3d);
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int Count() const { return count_; }
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void Rect(float x, float y, float w, float h, uint32_t color, int align = ALIGN_TOPLEFT);
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void hLine(float x1, float y, float x2, uint32_t color);
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void vLine(float x, float y1, float y2, uint32_t color);
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void Line(ImageID atlas_image, float x1, float y1, float x2, float y2, float thickness, uint32_t color);
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void RectOutline(float x, float y, float w, float h, uint32_t color, int align = ALIGN_TOPLEFT);
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void RectVGradient(float x, float y, float w, float h, uint32_t colorTop, uint32_t colorBottom);
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void RectVDarkFaded(float x, float y, float w, float h, uint32_t colorTop) {
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RectVGradient(x, y, w, h, colorTop, darkenColor(colorTop));
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}
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void MultiVGradient(float x, float y, float w, float h, const GradientStop *stops, int numStops);
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void RectCenter(float x, float y, float w, float h, uint32_t color) {
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Rect(x - w/2, y - h/2, w, h, color);
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}
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void Rect(float x, float y, float w, float h, float u, float v, float uw, float uh, uint32_t color);
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void V(float x, float y, float z, uint32_t color, float u, float v);
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void V(float x, float y, uint32_t color, float u, float v) {
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V(x, y, curZ_, color, u, v);
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}
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void Circle(float x, float y, float radius, float thickness, int segments, float startAngle, uint32_t color, float u_mul);
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void FillCircle(float x, float y, float radius, int segments, uint32_t color);
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// New drawing APIs
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// Must call this before you use any functions with atlas_image etc.
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void SetAtlas(const Atlas *_atlas) {
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atlas = _atlas;
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}
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const Atlas *GetAtlas() const { return atlas; }
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void SetFontAtlas(const Atlas *_atlas) {
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fontAtlas_ = _atlas;
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}
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const Atlas *GetFontAtlas() const { return fontAtlas_; }
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bool MeasureImage(ImageID atlas_image, float *w, float *h);
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void DrawImage(ImageID atlas_image, float x, float y, float scale, Color color = COLOR(0xFFFFFF), int align = ALIGN_TOPLEFT);
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// Good for stretching out a white image without edge artifacts that I'm getting on iOS.
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void DrawImageCenterTexel(ImageID atlas_image, float x1, float y1, float x2, float y2, Color color = COLOR(0xFFFFFF));
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void DrawImageStretch(ImageID atlas_image, float x1, float y1, float x2, float y2, Color color = COLOR(0xFFFFFF));
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void DrawImageStretchVGradient(ImageID atlas_image, float x1, float y1, float x2, float y2, Color color1, Color color2);
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void DrawImageStretch(ImageID atlas_image, const Bounds &bounds, Color color = COLOR(0xFFFFFF)) {
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DrawImageStretch(atlas_image, bounds.x, bounds.y, bounds.x2(), bounds.y2(), color);
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}
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void DrawImageRotated(ImageID atlas_image, float x, float y, float scale, float angle, Color color = COLOR(0xFFFFFF), bool mirror_h = false); // Always centers
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void DrawImageRotatedStretch(ImageID atlas_image, const Bounds &bounds, float scales[2], float angle, Color color = COLOR(0xFFFFFF), bool mirror_h = false);
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void DrawTexRect(float x1, float y1, float x2, float y2, float u1, float v1, float u2, float v2, Color color);
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void DrawTexRect(const Bounds &bounds, float u1, float v1, float u2, float v2, Color color) {
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DrawTexRect(bounds.x, bounds.y, bounds.x2(), bounds.y2(), u1, v1, u2, v2, color);
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}
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// Results in 18 triangles. Kind of expensive for a button.
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void DrawImage4Grid(ImageID atlas_image, float x1, float y1, float x2, float y2, Color color = COLOR(0xFFFFFF), float corner_scale = 1.0);
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// This is only 6 triangles, much cheaper.
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void DrawImage2GridH(ImageID atlas_image, float x1, float y1, float x2, Color color = COLOR(0xFFFFFF), float scale = 1.0);
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void MeasureText(FontID font, const char *text, float *w, float *h);
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// NOTE: Count is in plain chars not utf-8 chars!
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void MeasureTextCount(FontID font, const char *text, int count, float *w, float *h);
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void MeasureTextRect(FontID font, const char *text, int count, const Bounds &bounds, float *w, float *h, int align = 0);
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void DrawTextRect(FontID font, const char *text, float x, float y, float w, float h, Color color = 0xFFFFFFFF, int align = 0);
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void DrawText(FontID font, const char *text, float x, float y, Color color = 0xFFFFFFFF, int align = 0);
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void DrawTextShadow(FontID font, const char *text, float x, float y, Color color = 0xFFFFFFFF, int align = 0);
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void SetFontScale(float xs, float ys) {
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fontscalex = xs;
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fontscaley = ys;
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}
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static void DoAlign(int flags, float *x, float *y, float *w, float *h);
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void PushDrawMatrix(const Lin::Matrix4x4 &m) {
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drawMatrixStack_.push_back(drawMatrix_);
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drawMatrix_ = m;
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}
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void PopDrawMatrix() {
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drawMatrix_ = drawMatrixStack_.back();
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drawMatrixStack_.pop_back();
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}
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Lin::Matrix4x4 GetDrawMatrix() {
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return drawMatrix_;
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}
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void PushAlpha(float a) {
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alphaStack_.push_back(alpha_);
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alpha_ *= a;
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}
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void PopAlpha() {
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alpha_ = alphaStack_.back();
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alphaStack_.pop_back();
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}
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void SetCurZ(float curZ) {
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curZ_ = curZ;
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}
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void SetTintSaturation(float tint, float saturation) {
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tint_ = tint;
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saturation_ = saturation;
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}
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private:
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struct Vertex {
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float x, y, z;
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float u, v;
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uint32_t rgba;
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};
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Lin::Matrix4x4 drawMatrix_;
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std::vector<Lin::Matrix4x4> drawMatrixStack_;
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float alpha_ = 1.0f;
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std::vector<float> alphaStack_;
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Draw::DrawContext *draw_ = nullptr;
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Draw::Pipeline *pipeline_ = nullptr;
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Vertex *verts_;
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int count_ = 0;
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const Atlas *atlas = nullptr;
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const Atlas *fontAtlas_ = nullptr;
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bool inited_ = false;
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float fontscalex = 1.0f;
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float fontscaley = 1.0f;
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float tint_ = 0.0f;
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float saturation_ = 1.0f;
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float curZ_ = 0.0f;
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};
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