Commit b99543b68212f7509bf71b5586cf79103829d1dc
2021-01-11T20:40:11
opengl: More work on making line drawing match software renderer.
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diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index eb9d790..514ca27 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -914,9 +914,9 @@ GL_QueueDrawLines(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPo
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;
diff --git a/src/render/opengles/SDL_render_gles.c b/src/render/opengles/SDL_render_gles.c
index e6350f0..49878c8 100644
--- a/src/render/opengles/SDL_render_gles.c
+++ b/src/render/opengles/SDL_render_gles.c
@@ -587,9 +587,9 @@ GLES_QueueDrawLines(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_F
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index f0801ab..20743fe 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -811,9 +811,9 @@ GLES2_QueueDrawLines(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;