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[client] splash: pre-calculate & cache the radial gradient vectors
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parent
1770defea2
commit
1e660fb7e1
1 changed files with 37 additions and 24 deletions
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@ -24,40 +24,39 @@
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#include "../overlays.h"
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#include "../main.h"
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#include "overlay_utils.h"
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#include "common/array.h"
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#include "resources/lg-logo.svg.h"
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#include <math.h>
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#include <GL/gl.h>
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#define SEGMENTS 12
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static bool l_show;
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static bool l_fadeDone;
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static float l_alpha;
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static OverlayImage l_logo;
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static float l_vectors[SEGMENTS][2];
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static bool splash_init(void ** udata, const void * params)
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static void calcRadialVectors(float vectors[][2], int segments)
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{
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l_show = true;
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l_fadeDone = false;
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l_alpha = 1.0f;
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overlayLoadSVG(b_lg_logo_svg, b_lg_logo_svg_size, &l_logo, 200, 200);
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return true;
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}
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static void splash_free(void * udata)
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{
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overlayFreeImage(&l_logo);
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for (unsigned int i = 0; i < segments; ++i)
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{
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float angle = (i / (float)(segments - 1)) * M_PI * 2.0f;
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vectors[i][0] = cos(angle);
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vectors[i][1] = sin(angle);
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}
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}
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static void drawRadialGradient(ImDrawList * list, int x, int y, int w, int h,
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int steps, ImU32 innerColor, ImU32 outerColor)
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ImU32 innerColor, ImU32 outerColor,
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float vectors[0][2], int segments)
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{
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const ImVec2 uv = list->_Data->TexUvWhitePixel;
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ImDrawList_PrimReserve(list, steps * 3, steps + 2);
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for(int i = 0; i < steps; ++i)
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ImDrawList_PrimReserve(list, (segments - 1) * 3, segments + 1);
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for(int i = 0; i < segments - 1; ++i)
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{
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ImDrawList_PrimWriteIdx(list, list->_VtxCurrentIdx);
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ImDrawList_PrimWriteIdx(list, list->_VtxCurrentIdx + i + 1);
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@ -69,17 +68,30 @@ static void drawRadialGradient(ImDrawList * list, int x, int y, int w, int h,
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uv,
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innerColor);
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for (unsigned int i = 0; i < steps + 1; ++i)
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{
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float angle = (i / (float)steps) * M_PI * 2.0f;
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for (unsigned int i = 0; i < segments; ++i)
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ImDrawList_PrimWriteVtx(list,
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(ImVec2){
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x + cos(angle) * w,
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y + sin(angle) * h
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x + vectors[i][0] * w,
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y + vectors[i][1] * h
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},
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uv,
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outerColor);
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}
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}
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static bool splash_init(void ** udata, const void * params)
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{
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l_show = true;
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l_fadeDone = false;
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l_alpha = 1.0f;
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overlayLoadSVG(b_lg_logo_svg, b_lg_logo_svg_size, &l_logo, 200, 200);
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calcRadialVectors(l_vectors, ARRAY_LENGTH(l_vectors));
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return true;
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}
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static void splash_free(void * udata)
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{
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overlayFreeImage(&l_logo);
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}
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static int splash_render(void * udata, bool interactive, struct Rect * windowRects,
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@ -116,9 +128,10 @@ static int splash_render(void * udata, bool interactive, struct Rect * windowRec
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drawRadialGradient(list,
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screen->x / 2, screen->y / 2,
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screen->x , screen->y ,
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12,
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innerColor,
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outerColor);
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outerColor,
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l_vectors,
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ARRAY_LENGTH(l_vectors));
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ImDrawList_AddImage(
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list,
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