diff options
| author | sanine <sanine.not@pm.me> | 2022-09-28 17:42:56 -0500 |
|---|---|---|
| committer | sanine <sanine.not@pm.me> | 2022-09-28 17:42:56 -0500 |
| commit | 1cf9cc3408af7008451f9133fb95af66a9697d15 (patch) | |
| tree | b5c62dade54a67aefbb234ec9a35cfcf6d486120 /demo/honey.lua | |
| parent | 40e4c6890f3f94e360b5e0249ad0045f2133b390 (diff) | |
add basic cairo demo functions
Diffstat (limited to 'demo/honey.lua')
| -rw-r--r-- | demo/honey.lua | 45 |
1 files changed, 38 insertions, 7 deletions
diff --git a/demo/honey.lua b/demo/honey.lua index 113d845..d543488 100644 --- a/demo/honey.lua +++ b/demo/honey.lua @@ -188,15 +188,43 @@ gl.UseProgram(shader) gl.Uniform1i(gl.GetUniformLocation(shader, 'ourTexture'), 0) +--===== generate cairo texture =====-- + +local image = honey.image +local surface = image.surface_create(image.FORMAT_ARGB32, 512, 512) +local cr = image.context_create(surface) +image.context_select_font_face(cr, "sans-serif", image.FONT_SLANT_NORMAL, image.FONT_WEIGHT_NORMAL) +image.context_set_font_size(cr, 32) +image.context_set_source_rgb(cr, 1, 0, 0) +image.context_move_to(cr, 100, 100) +image.context_show_text(cr, "hello, world!") +local data = image.surface_get_data(surface) +gl.BindTexture(gl.TEXTURE_2D, texture) +gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_SWIZZLE_R, gl.GREEN) +gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_SWIZZLE_G, gl.BLUE) +gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_SWIZZLE_B, gl.ALPHA) +--gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_SWIZZLE_A, gl.RED) +gl.TexImage2D( + gl.TEXTURE_2D, 0, + gl.RGB, width, height, + gl.RGBA, gl.UNSIGNED_BYTE, + data +) +gl.GenerateMipmap(gl.TEXTURE_2D) + + --====== matrices ======-- local model = honey.glm.mat4() -honey.glm.mat4_identity(model) -local axis = honey.glm.vec3() -honey.glm.vec3_set(axis, 0, 1.0) -honey.glm.vec3_set(axis, 1, 0.0) -honey.glm.vec3_set(axis, 2, 0.0) -honey.glm.rotate(model, math.rad(-90), axis) +local axis1 = honey.glm.vec3() +honey.glm.vec3_set(axis1, 0, 1.0) +honey.glm.vec3_set(axis1, 1, 0.0) +honey.glm.vec3_set(axis1, 2, 0.0) + +local axis2 = honey.glm.vec3() +honey.glm.vec3_set(axis2, 0, 0.0) +honey.glm.vec3_set(axis2, 1, 1.0) +honey.glm.vec3_set(axis2, 2, 0.0) local view = honey.glm.mat4() honey.glm.mat4_identity(view) @@ -230,7 +258,8 @@ while not window.shouldClose(w) do local projectionL = gl.GetUniformLocation(shader, 'projection') honey.glm.mat4_identity(model) - honey.glm.rotate(model, math.pi*time, axis) + honey.glm.rotate(model, 0.5*math.pi*time, axis2) + honey.glm.rotate(model, math.rad(-90), axis1) gl.UniformMatrix4fv(modelL, false, model) gl.UniformMatrix4fv(viewL, false, view) @@ -251,3 +280,5 @@ end window.destroy(w) gl.Terminate() honey.audio.engine_uninit(engine) +image.surface_destroy(surface) +image.context_destroy(cr) |